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8
docs/overview/eye-tracking.md
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@ -21,7 +21,7 @@ Include the `webgazer.js` file in your experiment via a `<script>` tag.
### Load the jsPsych webgazer extension
The [webgazer extension](/extensions/jspsych-ext-webgazer.md) adds functionality to jsPsych for interacting with webgazer. Load it like you would a plugin file.
The [webgazer extension](../extensions/jspsych-ext-webgazer.md) adds functionality to jsPsych for interacting with webgazer. Load it like you would a plugin file.
```html
@ -45,7 +45,7 @@ jsPsych.init({
### Initialize the camera
To help the participant position their face correctly for eye tracking you can use the [jspsych-webgazer-init-camera plugin](/plugins/jspsych-webgazer-init-camera.ms). This will show the participant what the camera sees, including facial feature landmarks, and prevent the participant from continuing until their face is in good position for eye tracking. This plugin will also trigger the experiment to request permission to access the user's webcam if it hasn't already been granted.
To help the participant position their face correctly for eye tracking you can use the [jspsych-webgazer-init-camera plugin](../plugins/jspsych-webgazer-init-camera.md). This will show the participant what the camera sees, including facial feature landmarks, and prevent the participant from continuing until their face is in good position for eye tracking. This plugin will also trigger the experiment to request permission to access the user's webcam if it hasn't already been granted.
```js
@ -57,7 +57,7 @@ var init_camera_trial = {
### Calibration
To calibrate WebGazer, you can use the [jspsych-webgazer-calibrate plugin](/plugins/jspsych-webgazer-calibrate.md). This plugin allows you to specify a set of points on the screen for calibration and to choose the method for calibrating -- either clicking on each point or simply fixating on each point. The location of calibration points is specified in percentages, e.g., `[25,50]` will result in a point that is 25% of the width of the screen from the left edge and 50% of the height of the screen from the top edge. Options for controlling other details of the calibration are explained in the [documentation for the plugin](/plugins/jspsych-webgazer-calibrate.md).
To calibrate WebGazer, you can use the [jspsych-webgazer-calibrate plugin](../plugins/jspsych-webgazer-calibrate.md). This plugin allows you to specify a set of points on the screen for calibration and to choose the method for calibrating -- either clicking on each point or simply fixating on each point. The location of calibration points is specified in percentages, e.g., `[25,50]` will result in a point that is 25% of the width of the screen from the left edge and 50% of the height of the screen from the top edge. Options for controlling other details of the calibration are explained in the [documentation for the plugin](../plugins/jspsych-webgazer-calibrate.md).
Note that instructions are not included in the calibration plugin, so you'll likely want to use a different plugin (e.g., `html-button-response`) to display instructions prior to running the calibration.
@ -72,7 +72,7 @@ var calibration_trial = {
### Validation
To measure the accuracy and precision of the calibration, you can use the [jspsych-webgazer-vaidate plugin](/plugins/jspsych-webgazer-validate.md). Like the calibration plugin, you can specify a list of points to perform validation on. Here you can specify the points as either percentages or in terms of the distance from the center of the screen in pixels. Which mode you use will probably depend on how you are defining your stimuli throughout the experiment. You can also specify the radius of tolerance around each point, and the plugin will calculate the percentage of measured gaze samples within that radius. This is a potentially useful heuristic for deciding whether or not to calibrate again. Options for controlling other details of the validation are explained in the [documentation for the plugin](/plugins/jspsych-webgazer-validate.md).
To measure the accuracy and precision of the calibration, you can use the [jspsych-webgazer-vaidate plugin](../plugins/jspsych-webgazer-validate.md). Like the calibration plugin, you can specify a list of points to perform validation on. Here you can specify the points as either percentages or in terms of the distance from the center of the screen in pixels. Which mode you use will probably depend on how you are defining your stimuli throughout the experiment. You can also specify the radius of tolerance around each point, and the plugin will calculate the percentage of measured gaze samples within that radius. This is a potentially useful heuristic for deciding whether or not to calibrate again. Options for controlling other details of the validation are explained in the [documentation for the plugin](../plugins/jspsych-webgazer-validate.md).
```js

2
docs/overview/progress-bar.md
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@ -2,7 +2,7 @@
jsPsych can show a progress bar at the top of the experiment page indicating the subject's overall completion progress. The progress bar is rendered outside the jsPsych display element, and it requires the `jspsych.css` file to be loaded on the page. As of version 6.0, the progress bar looks like this:
![Progressbar Screenshot](/img/progress_bar.png)
![Progressbar Screenshot](../img/progress_bar.png)
To show the progress bar, set the `show_progress_bar` option in `jsPsych.init` to `true`:

8
docs/overview/prolific.md
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@ -4,9 +4,9 @@
## Capturing the Participant ID, Study ID, and Session ID
When creating a study on Prolific you must provide the URL to your study. You can host your jsPsych experiment however you'd like - some options are discussed in the [Running Experiments](/overview/running-experiments/#hosting-the-experiment-and-saving-the-data) documentation page. Once you've got a URL to your experiment, you can enter that in the *study link* section of Prolific. Then, click the option to record Prolific IDs via URL parameters.
When creating a study on Prolific you must provide the URL to your study. You can host your jsPsych experiment however you'd like - some options are discussed in the [Running Experiments](running-experiments.md#hosting-the-experiment-and-saving-the-data) documentation page. Once you've got a URL to your experiment, you can enter that in the *study link* section of Prolific. Then, click the option to record Prolific IDs via URL parameters.
![Prolific screenshot](/img/prolific-study-link.png)
![Prolific screenshot](../img/prolific-study-link.png)
This will append information about the participant's prolific ID (`PROLIFIC_PID`), the study's ID (`STUDY_ID`), and the session ID (`SESSION_ID`) to the URL that participants use to access your experiment.
@ -38,12 +38,12 @@ We can capture these variables with jsPsych, and add them to jsPsych's data. Thi
When the experiment is complete, Prolific requires that you send the participant to a specific URL that marks the session as complete on Prolific's server. The link is provided to you by Prolific in the *study completion* section of the setup.
![Prolific Study Completion Screenshot](/img/prolific-study-completion.png)
![Prolific Study Completion Screenshot](../img/prolific-study-completion.png)
You can accomplish this in a couple different ways.
!!! warning
It's important that you've saved all the data from your experiment before the participant returns to Prolific. Make sure that any server communication has completed prior to redirecting the participant. One way to do this is by using the async features of the `call-function` plugin ([example](/plugins/jspsych-call-function/#async-function-call)).
It's important that you've saved all the data from your experiment before the participant returns to Prolific. Make sure that any server communication has completed prior to redirecting the participant. One way to do this is by using the async features of the `call-function` plugin ([example](../plugins/jspsych-call-function.md#async-function-call)).
### Participant clicks a link

2
docs/overview/timeline.md
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@ -341,7 +341,7 @@ var face_name_procedure = {
## Looping timelines
Any timeline can be looped using the `loop_function` option. The loop function should be a function that evaluates to `true` if the timeline should repeat, and `false` if the timeline should end. It receives a single parameter, named `data` by convention. This parameter will be the [DataCollection object](/core_library/jspsych-data/#datacollection) with all of the data from the trials executed in the last iteration of the timeline. The loop function will be evaluated after the timeline is completed.
Any timeline can be looped using the `loop_function` option. The loop function should be a function that evaluates to `true` if the timeline should repeat, and `false` if the timeline should end. It receives a single parameter, named `data` by convention. This parameter will be the [DataCollection object](../core_library/jspsych-data.md#datacollection) with all of the data from the trials executed in the last iteration of the timeline. The loop function will be evaluated after the timeline is completed.
```javascript
var trial = {

4
docs/plugins/jspsych-animation.md
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@ -4,7 +4,7 @@ This plugin displays a sequence of images at a fixed frame rate. The sequence ca
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -18,7 +18,7 @@ render_on_canvas | boolean | true | If true, the images will be drawn onto a can
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

6
docs/plugins/jspsych-audio-button-response.md
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@ -4,13 +4,13 @@ This plugin plays audio files and records responses generated with a button clic
If the browser supports it, audio files are played using the WebAudio API. This allows for reasonably precise timing of the playback. The timing of responses generated is measured against the WebAudio specific clock, improving the measurement of response times. If the browser does not support the WebAudio API, then the audio file is played with HTML5 audio.
Audio files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the audio stimulus, you will need to [manually preload](/overview/media-preloading/#manual-preloading) the audio.
Audio files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the audio stimulus, you will need to [manually preload](../overview/media-preloading.md#manual-preloading) the audio.
The trial can end when the subject responds, when the audio file has finished playing, or if the subject has failed to respond within a fixed length of time. You can also prevent a button response from being made before the audio has finished playing.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------------------------ | ---------------- | ---------------------------------------- | ---------------------------------------- |
@ -27,7 +27,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| -------------- | ------- | ---------------------------------------- |

6
docs/plugins/jspsych-audio-keyboard-response.md
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@ -4,13 +4,13 @@ This plugin plays audio files and records responses generated with the keyboard.
If the browser supports it, audio files are played using the WebAudio API. This allows for reasonably precise timing of the playback. The timing of responses generated is measured against the WebAudio specific clock, improving the measurement of response times. If the browser does not support the WebAudio API, then the audio file is played with HTML5 audio.
Audio files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the audio stimulus, then you will need to [manually preload](/overview/media-preloading/#manual-preloading) the audio.
Audio files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the audio stimulus, then you will need to [manually preload](../overview/media-preloading.md#manual-preloading) the audio.
The trial can end when the subject responds, when the audio file has finished playing, or if the subject has failed to respond within a fixed length of time. You can also prevent a keyboard response from being recorded before the audio has finished playing.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of undefined must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of undefined must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------------------------ | ---------------- | ------------------ | ---------------------------------------- |
@ -24,7 +24,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-call-function.md
View File

@ -6,7 +6,7 @@ The function cannot take any arguments. If arguments are needed, then an anonymo
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -16,7 +16,7 @@ async | boolean | `false` | Set to true if `func` is an asynchoronous function.
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-canvas-button-response.md
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@ -4,7 +4,7 @@ This plugin can be used to draw a stimulus on a [HTML canvas element](https://ww
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -21,7 +21,7 @@ response_ends_trial | boolean | true | If true, then the trial will end whenever
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-canvas-keyboard-response.md
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@ -4,7 +4,7 @@ This plugin can be used to draw a stimulus on a [HTML canvas element](https://ww
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------------- | ---------------- | ------------------ | ---------------------------------------- |
@ -18,7 +18,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-canvas-slider-response.md
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@ -4,7 +4,7 @@ This plugin can be used to draw a stimulus on a [HTML canvas element](https://ww
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -25,7 +25,7 @@ response_ends_trial | boolean | true | If true, then the trial will end whenever
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-categorize-animation.md
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@ -4,7 +4,7 @@ The categorize animation plugin shows a sequence of images at a specified frame
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------------------------ | ---------------- | ------------------ | ---------------------------------------- |
@ -23,7 +23,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-categorize-html.md
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@ -4,7 +4,7 @@ The categorize html plugin shows an HTML object on the screen. The subject respo
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| -------------------------- | ---------------- | ------------------------ | ---------------------------------------- |
@ -25,7 +25,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-categorize-image.md
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@ -4,7 +4,7 @@ The categorize image plugin shows an image object on the screen. The subject res
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| -------------------------- | ---------------- | ------------------------ | ---------------------------------------- |
@ -26,7 +26,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-cloze.md
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@ -4,7 +4,7 @@ This plugin displays a text with certain words removed. Participants are asked t
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------- | -------- | ------------------ | ---------------------------------------- |
@ -15,7 +15,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| -------- | ---------------- | --------------------------- |

4
docs/plugins/jspsych-external-html.md
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@ -4,7 +4,7 @@ The HTML plugin displays an external HTML document (often a consent form). Eithe
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| -------------- | -------- | ---------------------------- | ---------------------------------------- |
@ -17,7 +17,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| ---- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-free-sort.md
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@ -4,7 +4,7 @@ The free-sort plugin displays one or more images on the screen that the particip
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -29,7 +29,7 @@ column_spread_factor | numeric | 1 | When the images appear outside the sort are
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-fullscreen.md
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@ -7,7 +7,7 @@ The fullscreen plugin allows the experiment to enter or exit fullscreen mode. Fo
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -18,7 +18,7 @@ delay_after | numeric | 1000 | The length of time to delay after entering fullsc
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-html-button-response.md
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@ -4,7 +4,7 @@ This plugin displays HTML content and records responses generated by button clic
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -20,7 +20,7 @@ response_ends_trial | boolean | true | If true, then the trial will end whenever
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-html-keyboard-response.md
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@ -5,7 +5,7 @@ This plugin displays HTML content and records responses generated with the keybo
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of undefined must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of undefined must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------------- | ---------------- | ------------------ | ---------------------------------------- |
@ -18,7 +18,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-html-slider-response.md
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@ -4,7 +4,7 @@ This plugin displays HTML content and allows the subject to respond by dragging
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -24,7 +24,7 @@ response_ends_trial | boolean | true | If true, then the trial will end whenever
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-iat-html.md
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@ -4,7 +4,7 @@ This plugin runs a single trial of the [implicit association test (IAT)](https:/
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ----------------------- | ---------------- | ---------------------------------------- | ---------------------------------------- |
@ -24,7 +24,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-iat-image.md
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@ -4,7 +4,7 @@ This plugin runs a single trial of the [implicit association test (IAT)](https:/
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ----------------------- | ------------------- | ---------------------------------------- | ---------------------------------------- |
@ -24,7 +24,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

6
docs/plugins/jspsych-image-button-response.md
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@ -2,11 +2,11 @@
This plugin displays an image and records responses generated with a button click. The stimulus can be displayed until a response is given, or for a pre-determined amount of time. The trial can be ended automatically if the subject has failed to respond within a fixed length of time. The button itself can be customized using HTML formatting.
Image files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the image stimulus, you will need to [manually preload](/overview/media-preloading/#manual-preloading) the images.
Image files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the image stimulus, you will need to [manually preload](../overview/media-preloading.md#manual-preloading) the images.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -26,7 +26,7 @@ render_on_canvas | boolean | true | If true, the image will be drawn onto a canv
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

6
docs/plugins/jspsych-image-keyboard-response.md
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@ -2,11 +2,11 @@
This plugin displays and image and records responses generated with the keyboard. The stimulus can be displayed until a response is given, or for a pre-determined amount of time. The trial can be ended automatically if the subject has failed to respond within a fixed length of time.
Image files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the image stimulus, you will need to [manually preload](/overview/media-preloading/#manual-preloading) the images.
Image files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the image stimulus, you will need to [manually preload](../overview/media-preloading.md#manual-preloading) the images.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of undefined must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of undefined must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| --------------------- | ---------------- | ------------------ | ---------------------------------------- |
@ -23,7 +23,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

6
docs/plugins/jspsych-image-slider-response.md
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@ -2,11 +2,11 @@
This plugin displays and image and allows the subject to respond by dragging a slider.
Image files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the image stimulus, you will need to [manually preload](/overview/media-preloading/#manual-preloading) the images.
Image files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the image stimulus, you will need to [manually preload](../overview/media-preloading.md#manual-preloading) the images.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -30,7 +30,7 @@ render_on_canvas | boolean | true | If true, the image will be drawn onto a canv
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-instructions.md
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@ -4,7 +4,7 @@ This plugin is for showing instructions to the subject. It allows subjects to na
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| --------------------- | ------- | ------------- | ---------------------------------------- |
@ -21,7 +21,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| ------------ | ----------- | ---------------------------------------- |

4
docs/plugins/jspsych-maxdiff.md
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@ -4,7 +4,7 @@ The maxdiff plugin displays a table with rows of alternatives to be selected for
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -18,7 +18,7 @@ button_label | string | 'Continue' | Label of the button.
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

10
docs/plugins/jspsych-preload.md
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@ -1,19 +1,19 @@
# jspsych-preload
This plugin loads images, audio, and video files. It is used for loading files into the browser's memory before they are needed in the experiment, in order to improve stimulus and response timing, and avoid disruption to the experiment flow. We recommend using this plugin anytime you are loading media files, and especially when your experiment requires large and/or many media files. See the [Media Preloading page](/overview/media-preloading/) for more information.
This plugin loads images, audio, and video files. It is used for loading files into the browser's memory before they are needed in the experiment, in order to improve stimulus and response timing, and avoid disruption to the experiment flow. We recommend using this plugin anytime you are loading media files, and especially when your experiment requires large and/or many media files. See the [Media Preloading page](../overview/media-preloading/) for more information.
The preload trial will end as soon as all files have loaded successfully. The trial will end or stop with an error message when one of these two scenarios occurs (whichever comes first): (a) all files have not finished loading when the `max_load_time` duration is reached, or (b) all file requests have responded with either a load or fail event, and one or more files has failed to load. The `continue_after_error` parameter determines whether the trial will stop with an error message or end (allowing the experiment to continue) when preloading is not successful.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. While there are no specific parameters that are required, the plugin expects to be given a set of files to load through one or more of the following parameters: `auto_preload` or `trials` (for automatic loading), and/or `images`, `audio`, `video` (for manual loading). To automatically load files based on a timeline of trials, either set the `auto_preload` parameter is `true` (to load files based on the main timeline passed to `jsPsych.init`) or use the `trials` parameter to load files based on a specific subset of trials. To manually load a set of files, use the `images`, `audio`, and `video` parameters. You can combine automatic and manual loading methods in a single preload trial.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. While there are no specific parameters that are required, the plugin expects to be given a set of files to load through one or more of the following parameters: `auto_preload` or `trials` (for automatic loading), and/or `images`, `audio`, `video` (for manual loading). To automatically load files based on a timeline of trials, either set the `auto_preload` parameter is `true` (to load files based on the main timeline passed to `jsPsych.init`) or use the `trials` parameter to load files based on a specific subset of trials. To manually load a set of files, use the `images`, `audio`, and `video` parameters. You can combine automatic and manual loading methods in a single preload trial.
All other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| --------------------- | -------------- | -------------------------------- | ---------------------------------------- |
| auto_preload | boolean | false | If `true`, the plugin will preload any files that can be automatically preloaded based on the main experiment timeline that is passed to `jsPsych.init`. If `false`, any file(s) to be preloaded should be specified by passing a timeline array to the `trials` parameter and/or an array of file paths to the `images`, `audio`, and/or `video` parameters. Setting this parameter to `false` is useful when you plan to preload your files in smaller batches throughout the experiment. |
| trials | timeline array | [] | An array containing one or more jsPsych trial or timeline objects. This parameter is useful when you want to automatically preload stimuli files from a specific subset of the experiment. See [Creating an Experiment: The Timeline](/overview/timeline) for information on constructing timelines. |
| trials | timeline array | [] | An array containing one or more jsPsych trial or timeline objects. This parameter is useful when you want to automatically preload stimuli files from a specific subset of the experiment. See [Creating an Experiment: The Timeline](../overview/timeline) for information on constructing timelines. |
| images | array | [] | Array containing file paths for one or more image files to preload. This option is typically used for image files that can't be automatically preloaded from the timeline. |
| audio | array | [] | Array containing file paths for one or more audio files to preload. This option is typically used for audio files that can't be automatically preloaded from the timeline. |
| video | array | [] | Array containing file paths for one or more video files to preload. This option is typically used for video files that can't be automatically preloaded from the timeline. |
@ -28,7 +28,7 @@ All other parameters can be left unspecified if the default value is acceptable.
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins/#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| -------------- | ------- | ---------------------------------------- |
@ -190,4 +190,4 @@ In addition to the [default data collected by all plugins](/overview/plugins/#da
<a target="_blank" rel="noopener noreferrer" href="/demos/jspsych-preload-demo4.html">Open demo in new tab</a>
For more examples, see the `jspsych-preload.html` file in the `/examples` folder of the release and the [Media Preloading](/overview/media-preloading) documentation page.
For more examples, see the `jspsych-preload.html` file in the `/examples` folder of the release and the [Media Preloading](../overview/media-preloading) documentation page.

4
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@ -11,7 +11,7 @@ For optimal performance, fullscreen mode should be manually triggered by the use
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Descripton |
| ------------------------ | ---------------- | -------------------- | ---------------------------------------- |
@ -61,7 +61,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects all parameter data described above and the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects all parameter data described above and the following data for each trial.
| Name | Type | Value |
| ---------------- | ----------- | ---------------------------------------- |

4
docs/plugins/jspsych-reconstruction.md
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@ -6,7 +6,7 @@ The stimulus must be defined through a function that returns an HTML-formatted s
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -19,7 +19,7 @@ button_label | string | 'Continue' | The text that appears on the button to fini
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-resize.md
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@ -4,7 +4,7 @@ This plugin displays a resizable div container that allows the user to drag unti
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -17,7 +17,7 @@ starting_size | numeric | 100 | The initial size of the box, in pixels, along th
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-same-different-html.md
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@ -4,7 +4,7 @@ The same-different-html plugin displays two stimuli sequentially. Stimuli are HT
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| -------------------- | ------- | ------------- | ---------------------------------------- |
@ -20,7 +20,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-same-different-image.md
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@ -4,7 +4,7 @@ The same-different-image plugin displays two stimuli sequentially. Stimuli are i
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| -------------------- | ------- | ------------- | ---------------------------------------- |
@ -20,7 +20,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-serial-reaction-time-mouse.md
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@ -4,7 +4,7 @@ The serial reaction time mouse plugin implements a generalized version of the SR
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------------------- | -------------- | ------------- | ---------------------------------------- |
@ -21,7 +21,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| ------ | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-serial-reaction-time.md
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@ -4,7 +4,7 @@ The serial reaction time plugin implements a generalized version of the SRT task
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ---------------------- | ---------------- | --------------------- | ---------------------------------------- |
@ -23,7 +23,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

4
docs/plugins/jspsych-survey-html-form.md
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@ -4,7 +4,7 @@ The survey-html-form plugin displays a set of `<inputs>` from a HTML string. The
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -17,7 +17,7 @@ autocomplete | boolean | false | This determines whether or not all of the input
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-survey-likert.md
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@ -4,7 +4,7 @@ The survey-likert plugin displays a set of questions with Likert scale responses
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -17,7 +17,7 @@ autocomplete | boolean | false | This determines whether or not all of the input
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
docs/plugins/jspsych-survey-multi-choice.md
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@ -4,7 +4,7 @@ The survey-multi-choice plugin displays a set of questions with multiple choice
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -16,7 +16,7 @@ autocomplete | boolean | false | This determines whether or not all of the input
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
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@ -4,7 +4,7 @@ The survey-multi-select plugin displays a set of questions with multiple select
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -17,7 +17,7 @@ autocomplete | boolean | false | This determines whether or not all of the input
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

4
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@ -4,7 +4,7 @@ The survey-text plugin displays a set of questions with free response text field
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -16,7 +16,7 @@ autocomplete | boolean | false | This determines whether or not all of the input
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

6
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@ -2,11 +2,11 @@
This plugin plays a video and records responses generated by button click. The stimulus can be displayed until a response is given, or for a pre-determined amount of time. The trial can be ended automatically when the subject responds, when the video file has finished playing, or if the subject has failed to respond within a fixed length of time. You can also prevent a button response from being made before the video has finished playing. The button itself can be customized using HTML formatting.
Video files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the video stimulus, you will need to [manually preload](/overview/media-preloading/#manual-preloading) the videos. Also note that video preloading is disabled when the experiment is running as a file (i.e. opened directly in the browser, rather than through a server), in order to prevent CORS errors - see the section on [Running Experiments](/overview/running-experiments.md) for more information.
Video files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the video stimulus, you will need to [manually preload](../overview/media-preloading.md#manual-preloading) the videos. Also note that video preloading is disabled when the experiment is running as a file (i.e. opened directly in the browser, rather than through a server), in order to prevent CORS errors - see the section on [Running Experiments](../overview/running-experiments.md) for more information.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -31,7 +31,7 @@ response_allowed_while_playing | boolean | true | If true, then responses are al
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

6
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@ -2,11 +2,11 @@
This plugin plays a video file and records a keyboard response. The stimulus can be displayed until a response is given, or for a pre-determined amount of time. The trial can be ended automatically when the subject responds, when the video file has finished playing, or if the subject has failed to respond within a fixed length of time. You can also prevent a keyboard response from being recorded before the video has finished playing.
Video files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the video stimulus, you will need to [manually preload](/overview/media-preloading/#manual-preloading) the videos. Also note that video preloading is disabled when the experiment is running as a file (i.e. opened directly in the browser, rather than through a server), in order to prevent CORS errors - see the section on [Running Experiments](/overview/running-experiments.md) for more information.
Video files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the video stimulus, you will need to [manually preload](../overview/media-preloading.md#manual-preloading) the videos. Also note that video preloading is disabled when the experiment is running as a file (i.e. opened directly in the browser, rather than through a server), in order to prevent CORS errors - see the section on [Running Experiments](../overview/running-experiments.md) for more information.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------------------------ | ---------------- | ----------------------- | ---------------------------------------- |
@ -27,7 +27,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ------- | ---------------------------------------- |

6
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This plugin plays a video and allows the subject to respond by dragging a slider. The stimulus can be displayed until a response is given, or for a pre-determined amount of time. The trial can be ended automatically when the subject responds, when the video file has finished playing, or if the subject has failed to respond within a fixed length of time. You can also prevent the slider response from being made before the video has finished playing.
Video files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the video stimulus, you will need to [manually preload](/overview/media-preloading/#manual-preloading) the videos. Also note that video preloading is disabled when the experiment is running as a file (i.e. opened directly in the browser, rather than through a server), in order to prevent CORS errors - see the section on [Running Experiments](/overview/running-experiments.md) for more information.
Video files can be automatically preloaded by jsPsych using the [`preload` plugin](jspsych-preload.md). However, if you are using timeline variables or another dynamic method to specify the video stimulus, you will need to [manually preload](../overview/media-preloading.md#manual-preloading) the videos. Also note that video preloading is disabled when the experiment is running as a file (i.e. opened directly in the browser, rather than through a server), in order to prevent CORS errors - see the section on [Running Experiments](../overview/running-experiments.md) for more information.
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -35,7 +35,7 @@ response_allowed_while_playing | boolean | true | If true, then responses are al
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------

6
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@ -2,11 +2,11 @@
This plugin presents a customizable visual-search task modelled after [Wang, Cavanagh, & Green (1994)](http://dx.doi.org/10.3758/BF03206946). The subject indicates whether or not a target is present among a set of distractors. The stimuli are displayed in a circle, evenly-spaced, equidistant from a fixation point. Here is an example using normal and backward Ns:
![Sample Visual Search Stimulus](/img/visual_search_example.jpg)
![Sample Visual Search Stimulus](../img/visual_search_example.jpg)
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| ------------------ | --------------- | ------------- | ---------------------------------------- |
@ -25,7 +25,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| -------------- | ----------- | ---------------------------------------- |

4
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@ -10,7 +10,7 @@ This plugin requires the Snap.svg library, available at [http://www.snapsvg.io](
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| --------------------- | ---------------- | ------------------ | ---------------------------------------- |
@ -25,7 +25,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| --------- | ----------- | ---------------------------------------- |

4
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@ -6,7 +6,7 @@ Fiser, J., & Aslin, R. N. (2001). Unsupervised statistical learning of higher-or
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
| Parameter | Type | Default Value | Description |
| -------------- | ------- | ------------- | ---------------------------------------- |
@ -16,7 +16,7 @@ In addition to the [parameters available in all plugins](/overview/plugins#param
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
| Name | Type | Value |
| -------- | ----------- | ---------------------------------------- |

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# jspsych-webgazer-calibrate
This plugin can be used to calibrate the [WebGazer extension](/extensions/jspsych-ext-webgazer). For a narrative description of eye tracking with jsPsych, see the [eye tracking overview](/overview/eye-tracking).
This plugin can be used to calibrate the [WebGazer extension](../extensions/jspsych-ext-webgazer). For a narrative description of eye tracking with jsPsych, see the [eye tracking overview](../overview/eye-tracking).
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -18,14 +18,14 @@ time_per_point | numeric | 1000 | If `calibration_mode` is set to `view`, then t
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------
No data currently added by this plugin. Use the [webgazer-validate](/plugins/jspsych-webgazer-validate) plugin to measure the precision and accuracy of calibration.
No data currently added by this plugin. Use the [webgazer-validate](jspsych-webgazer-validate) plugin to measure the precision and accuracy of calibration.
## Example
Because the eye tracking plugins need to be used in conjunction with each other, please see the [example on the eye tracking overview page](/overview/eye-tracking/#example) for an integrated example.
Because the eye tracking plugins need to be used in conjunction with each other, please see the [example on the eye tracking overview page](../overview/eye-tracking.md#example) for an integrated example.

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# jspsych-webgazer-init-camera
This plugin initializes the camera and helps the participant center their face in the camera view for using the the [WebGazer extension](/extensions/jspsych-ext-webgazer). For a narrative description of eye tracking with jsPsych, see the [eye tracking overview](/overview/eye-tracking).
This plugin initializes the camera and helps the participant center their face in the camera view for using the the [WebGazer extension](../extensions/jspsych-ext-webgazer). For a narrative description of eye tracking with jsPsych, see the [eye tracking overview](../overview/eye-tracking).
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -13,7 +13,7 @@ button_text | string | Continue | The text for the button that participants clic
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------
@ -21,4 +21,4 @@ load_time | numeric | The time it took for webgazer to initialize. This can be a
## Example
Because the eye tracking plugins need to be used in conjunction with each other, please see the [example on the eye tracking overview page](/overview/eye-tracking/#example) for an integrated example.
Because the eye tracking plugins need to be used in conjunction with each other, please see the [example on the eye tracking overview page](../overview/eye-tracking.md#example) for an integrated example.

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# jspsych-webgazer-validate
This plugin can be used to measure the accuracy and precision of gaze predictions made by the [WebGazer extension](/extensions/jspsych-ext-webgazer). For a narrative description of eye tracking with jsPsych, see the [eye tracking overview](/overview/eye-tracking).
This plugin can be used to measure the accuracy and precision of gaze predictions made by the [WebGazer extension](../extensions/jspsych-ext-webgazer). For a narrative description of eye tracking with jsPsych, see the [eye tracking overview](../overview/eye-tracking).
## Parameters
In addition to the [parameters available in all plugins](/overview/plugins#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
In addition to the [parameters available in all plugins](../overview/plugins.md#parameters-available-in-all-plugins), this plugin accepts the following parameters. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
Parameter | Type | Default Value | Description
----------|------|---------------|------------
@ -19,7 +19,7 @@ show_validation_data | bool | false | If `true` then a visualization of the vali
## Data Generated
In addition to the [default data collected by all plugins](/overview/plugins#data-collected-by-all-plugins), this plugin collects the following data for each trial.
In addition to the [default data collected by all plugins](../overview/plugins.md#data-collected-by-all-plugins), this plugin collects the following data for each trial.
Name | Type | Value
-----|------|------
@ -31,4 +31,4 @@ validation_points | array | The list of validation points, in the order that the
## Example
Because the eye tracking plugins need to be used in conjunction with each other, please see the [example on the eye tracking overview page](/overview/eye-tracking/#example) for an integrated example.
Because the eye tracking plugins need to be used in conjunction with each other, please see the [example on the eye tracking overview page](../overview/eye-tracking.md#example) for an integrated example.

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@ -1,54 +1,54 @@
# List of Plugins
These are the plugins that are included in the jsPsych release. If you don't see a plugin that will work for your needs, you can post on [GitHub Discussions](https://github.com/jspsych/jsPsych/discussions) to see if anyone else in the community has an unofficial plugin to share or to get help creating a new plugin. You can also view the [documentation on creating a new plugin](/overview/plugins/#creating-a-new-plugin) or [watch a video tutorial on creating a new plugin](https://www.youtube.com/watch?v=XQcsFwAmbiw&list=PLnfo1lBY1P2Mf_o6rV5wiqqn92Mw3UTGh&index=4).
These are the plugins that are included in the jsPsych release. If you don't see a plugin that will work for your needs, you can post on [GitHub Discussions](https://github.com/jspsych/jsPsych/discussions) to see if anyone else in the community has an unofficial plugin to share or to get help creating a new plugin. You can also view the [documentation on creating a new plugin](../overview/plugins.md#creating-a-new-plugin) or [watch a video tutorial on creating a new plugin](https://www.youtube.com/watch?v=XQcsFwAmbiw&list=PLnfo1lBY1P2Mf_o6rV5wiqqn92Mw3UTGh&index=4).
Plugin | Description
------ | -----------
[jspsych&#8209;animation](/plugins/jspsych-animation) | Shows a sequence of images at a specified frame rate. Records key presses (including timing information) made by the subject while they are viewing the animation.
[jspsych&#8209;audio&#8209;button&#8209;response](/plugins/jspsych-audio-button-response) | Play an audio file and allow the subject to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
[jspsych&#8209;audio&#8209;keyboard&#8209;response](/plugins/jspsych-audio-keyboard-response) | Play an audio file and allow the subject to respond by pressing a key.
[jspsych&#8209;audio&#8209;slider&#8209;response](/plugins/jspsych-audio-slider-response) | Play an audio file and allow the subject to respond by moving a slider to indicate a value.
[jspsych&#8209;call&#8209;function](/plugins/jspsych-call-function) | Executes an arbitrary function call. Doesn't display anything to the subject, and the subject is usually unaware that this plugin has even executed. It's useful for performing tasks at specified times in the experiment, such as saving data.
[jspsych&#8209;canvas&#8209;button&#8209;response](/plugins/jspsych-canvas-button-response) | Draw a stimulus on a [HTML canvas element](https://www.w3schools.com/html/html5_canvas.asp), and record a button click response. Useful for displaying dynamic, parametrically-defined graphics, and for controlling the positioning of multiple graphical elements (shapes, text, images).
[jspsych&#8209;canvas&#8209;keyboard&#8209;response](/plugins/jspsych-canvas-keyboard-response) | Draw a stimulus on a [HTML canvas element](https://www.w3schools.com/html/html5_canvas.asp), and record a key press response. Useful for displaying dynamic, parametrically-defined graphics, and for controlling the positioning of multiple graphical elements (shapes, text, images).
[jspsych&#8209;canvas&#8209;slider&#8209;response](/plugins/jspsych-canvas-slider-response) | Draw a stimulus on a [HTML canvas element](https://www.w3schools.com/html/html5_canvas.asp), and ask the subject to respond by moving a slider to indicate a value. Useful for displaying dynamic, parametrically-defined graphics, and for controlling the positioning of multiple graphical elements (shapes, text, images).
[jspsych&#8209;categorize&#8209;animation](/plugins/jspsych-categorize-animation) | The subject responds to an animation and can be given feedback about their response.
[jspsych&#8209;categorize&#8209;html](/plugins/jspsych-categorize-html) | The subject responds to an HTML-formatted stimulus using the keyboard and can be given feedback about the correctness of their response.
[jspsych&#8209;categorize&#8209;image](/plugins/jspsych-categorize-image) | The subject responds to an image using the keyboard and can be given feedback about the correctness of their response.
[jspsych&#8209;cloze](/plugins/jspsych-cloze) | Plugin for displaying a cloze test and checking participants answers against a correct solution.
[jspsych&#8209;external&#8209;html](/plugins/jspsych-external-html) | Displays an external HTML page (such as a consent form) and lets the subject respond by clicking a button or pressing a key. Plugin can validate their response, which is useful for making sure that a subject has granted consent before starting the experiment.
[jspsych&#8209;free&#8209;sort](/plugins/jspsych-free-sort) | Displays a set of images on the screen in random locations. Subjects can click and drag the images to move them around the screen. Records all the moves made by the subject, so the sequence of moves can be recovered from the data.
[jspsych&#8209;fullscreen](/plugins/jspsych-fullscreen) | Toggles the experiment in and out of fullscreen mode.
[jspsych&#8209;html&#8209;button&#8209;response](/plugins/jspsych-html-button-response) | Display an HTML-formatted stimulus and allow the subject to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
[jspsych&#8209;html&#8209;keyboard&#8209;response](/plugins/jspsych-html-keyboard-response) | Display an HTML-formatted stimulus and allow the subject to respond by pressing a key.
[jspsych&#8209;html&#8209;slider&#8209;response](/plugins/jspsych-html-slider-response) | Display an HTML-formatted stimulus and allow the subject to respond by moving a slider to indicate a value.
[jspsych&#8209;iat&#8209;html](/plugins/jspsych-iat-html) | The implicit association task, using HTML-formatted stimuli.
[jspsych&#8209;iat&#8209;image](/plugins/jspsych-iat-image) | The implicit association task, using images as stimuli.
[jspsych&#8209;image&#8209;button&#8209;response](/plugins/jspsych-image-button-response) | Display an image and allow the subject to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
[jspsych&#8209;image&#8209;keyboard&#8209;response](/plugins/jspsych-image-keyboard-response) | Display an image and allow the subject to respond by pressing a key.
[jspsych&#8209;image&#8209;slider&#8209;response](/plugins/jspsych-image-slider-response) | Display an image and allow the subject to respond by moving a slider to indicate a value.
[jspsych&#8209;instructions](/plugins/jspsych-instructions) | For displaying instructions to the subject. Allows the subject to navigate between pages of instructions using keys or buttons.
[jspsych&#8209;maxdiff](/plugins/jspsych-maxdiff) | Displays rows of alternatives to be selected for two mutually-exclusive categories, typically as 'most' or 'least' on a particular criteria (e.g. importance, preference, similarity). The participant responds by selecting one radio button corresponding to an alternative in both the left and right response columns.
[jspsych&#8209;preload](/plugins/jspsych-preload) | This plugin loads images, audio, and video files into the browser's memory before they are needed in the experiment, in order to improve stimulus and response timing, and to avoid disrupting the flow of the experiment.
[jspsych&#8209;rdk](/plugins/jspsych-rdk) | This plugin displays a Random Dot Kinematogram (RDK) and allows the subject to report the primary direction of motion by pressing a key on the keyboard.
[jspsych&#8209;reconstruction](/plugins/jspsych-reconstruction) | The subject interacts with a stimulus by modifying a parameter of the stimulus and observing the change in the stimulus in real-time.
[jspsych&#8209;resize](/plugins/jspsych-resize) | Calibrate the display so that materials display with a known physical size.
[jspsych&#8209;same&#8209;different&#8209;html](/plugins/jspsych-same-different-html) | A same-different judgment task. An HTML-formatted stimulus is shown, followed by a brief gap, and then another stimulus is shown. The subject indicates whether the stimuli are the same or different.
[jspsych&#8209;same&#8209;different&#8209;image](/plugins/jspsych-same-different-image) | A same-different judgment task. An image is shown, followed by a brief gap, and then another stimulus is shown. The subject indicates whether the stimuli are the same or different.
[jspsych&#8209;serial&#8209;reaction&#8209;time](/plugins/jspsych-serial-reaction-time) | A set of boxes are displayed on the screen and one of them changes color. The subject presses a key that corresponds to the different color box as fast as possible.
[jspsych&#8209;serial&#8209;reaction&#8209;time&#8209;mouse](/plugins/jspsych-serial-reaction-time-mouse) | A set of boxes are displayed on the screen and one of them changes color. The subjects clicks the box that changed color as fast as possible.
[jspsych&#8209;survey&#8209;html&#8209;form](/plugins/jspsych-survey-html-form) | Renders a custom HTML form. Allows for mixing multiple kinds of form input.
[jspsych&#8209;survey&#8209;likert](/plugins/jspsych-survey-likert) | Displays likert-style questions.
[jspsych&#8209;survey&#8209;multi&#8209;choice](/plugins/jspsych-survey-multi-choice) | Displays multiple choice questions with one answer allowed per question.
[jspsych&#8209;survey&#8209;multi&#8209;select](/plugins/jspsych-survey-multi-select) | Displays multiple choice questions with multiple answes allowed per question.
[jspsych&#8209;survey&#8209;text](/plugins/jspsych-survey-text) | Shows a prompt with a text box. The subject writes a response and then submits by clicking a button.
[jspsych&#8209;video&#8209;button&#8209;response](/plugins/jspsych-video-button-response) | Displays a video file with many options for customizing playback. Subject responds to the video by pressing a button.
[jspsych&#8209;video&#8209;keyboard&#8209;response](/plugins/jspsych-video-keyboard-response) | Displays a video file with many options for customizing playback. Subject responds to the video by pressing a key.
[jspsych&#8209;video&#8209;slider&#8209;response](/plugins/jspsych-video-slider-response) | Displays a video file with many options for customizing playback. Subject responds to the video by moving a slider.
[jspsych&#8209;virtual&#8209;chinrest](/plugins/jspsych-virtual-chinrest) | An implementation of the "virutal chinrest" procedure developed by [Li, Joo, Yeatman, and Reinecke (2020)](https://doi.org/10.1038/s41598-019-57204-1). Calibrates the monitor to display items at a known physical size by having participants scale an image to be the same size as a physical credit card. Then uses a blind spot task to estimate the distance between the participant and the display.
[jspsych&#8209;visual&#8209;search&#8209;circle](/plugins/jspsych-visual-search-circle) | A customizable visual-search task modelled after [Wang, Cavanagh, & Green (1994)](http://dx.doi.org/10.3758/BF03206946). The subject indicates whether or not a target is present among a set of distractors. The stimuli are displayed in a circle, evenly-spaced, equidistant from a fixation point.
[jspsych&#8209;vsl&#8209;animate&#8209;occlusion](/plugins/jspsych-vsl-animate-occlusion) | A visual statistical learning paradigm based on [Fiser & Aslin (2002)](http://dx.doi.org/10.1037//0278-7393.28.3.458). A sequence of stimuli are shown in an oscillatory motion. An occluding rectangle is in the center of the display, and the stimuli change when they are behind the rectangle.
[jspsych&#8209;vsl&#8209;grid&#8209;scene](/plugins/jspsych-vsl-grid-scene) | A visual statistical learning paradigm based on [Fiser & Aslin (2001)](http://dx.doi.org/10.1111/1467-9280.00392). A scene made up of individual stimuli arranged in a grid is shown. This plugin can also generate the HTML code to render the stimuli for use in other plugins.
[jspsych&#8209;webgazer&#8209;calibrate](/plugins/jspsych-webgazer-calibrate) | Calibrates the WebGazer extension for eye tracking.
[jspsych&#8209;webgazer&#8209;init&#8209;camera](/plugins/jspsych-webgazer-init-camera) | Initializes the camera and helps the participant center their face for eye tracking.
[jspsych&#8209;webgazer&#8209;validate](/plugins/jspsych-webgazer-validate) | Performs validation to measure precision and accuracy of WebGazer eye tracking predictions.
[jspsych&#8209;animation](jspsych-animation) | Shows a sequence of images at a specified frame rate. Records key presses (including timing information) made by the subject while they are viewing the animation.
[jspsych&#8209;audio&#8209;button&#8209;response](jspsych-audio-button-response) | Play an audio file and allow the subject to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
[jspsych&#8209;audio&#8209;keyboard&#8209;response](jspsych-audio-keyboard-response) | Play an audio file and allow the subject to respond by pressing a key.
[jspsych&#8209;audio&#8209;slider&#8209;response](jspsych-audio-slider-response) | Play an audio file and allow the subject to respond by moving a slider to indicate a value.
[jspsych&#8209;call&#8209;function](jspsych-call-function) | Executes an arbitrary function call. Doesn't display anything to the subject, and the subject is usually unaware that this plugin has even executed. It's useful for performing tasks at specified times in the experiment, such as saving data.
[jspsych&#8209;canvas&#8209;button&#8209;response](jspsych-canvas-button-response) | Draw a stimulus on a [HTML canvas element](https://www.w3schools.com/html/html5_canvas.asp), and record a button click response. Useful for displaying dynamic, parametrically-defined graphics, and for controlling the positioning of multiple graphical elements (shapes, text, images).
[jspsych&#8209;canvas&#8209;keyboard&#8209;response](jspsych-canvas-keyboard-response) | Draw a stimulus on a [HTML canvas element](https://www.w3schools.com/html/html5_canvas.asp), and record a key press response. Useful for displaying dynamic, parametrically-defined graphics, and for controlling the positioning of multiple graphical elements (shapes, text, images).
[jspsych&#8209;canvas&#8209;slider&#8209;response](jspsych-canvas-slider-response) | Draw a stimulus on a [HTML canvas element](https://www.w3schools.com/html/html5_canvas.asp), and ask the subject to respond by moving a slider to indicate a value. Useful for displaying dynamic, parametrically-defined graphics, and for controlling the positioning of multiple graphical elements (shapes, text, images).
[jspsych&#8209;categorize&#8209;animation](jspsych-categorize-animation) | The subject responds to an animation and can be given feedback about their response.
[jspsych&#8209;categorize&#8209;html](jspsych-categorize-html) | The subject responds to an HTML-formatted stimulus using the keyboard and can be given feedback about the correctness of their response.
[jspsych&#8209;categorize&#8209;image](jspsych-categorize-image) | The subject responds to an image using the keyboard and can be given feedback about the correctness of their response.
[jspsych&#8209;cloze](jspsych-cloze) | Plugin for displaying a cloze test and checking participants answers against a correct solution.
[jspsych&#8209;external&#8209;html](jspsych-external-html) | Displays an external HTML page (such as a consent form) and lets the subject respond by clicking a button or pressing a key. Plugin can validate their response, which is useful for making sure that a subject has granted consent before starting the experiment.
[jspsych&#8209;free&#8209;sort](jspsych-free-sort) | Displays a set of images on the screen in random locations. Subjects can click and drag the images to move them around the screen. Records all the moves made by the subject, so the sequence of moves can be recovered from the data.
[jspsych&#8209;fullscreen](jspsych-fullscreen) | Toggles the experiment in and out of fullscreen mode.
[jspsych&#8209;html&#8209;button&#8209;response](jspsych-html-button-response) | Display an HTML-formatted stimulus and allow the subject to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
[jspsych&#8209;html&#8209;keyboard&#8209;response](jspsych-html-keyboard-response) | Display an HTML-formatted stimulus and allow the subject to respond by pressing a key.
[jspsych&#8209;html&#8209;slider&#8209;response](jspsych-html-slider-response) | Display an HTML-formatted stimulus and allow the subject to respond by moving a slider to indicate a value.
[jspsych&#8209;iat&#8209;html](jspsych-iat-html) | The implicit association task, using HTML-formatted stimuli.
[jspsych&#8209;iat&#8209;image](jspsych-iat-image) | The implicit association task, using images as stimuli.
[jspsych&#8209;image&#8209;button&#8209;response](jspsych-image-button-response) | Display an image and allow the subject to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
[jspsych&#8209;image&#8209;keyboard&#8209;response](jspsych-image-keyboard-response) | Display an image and allow the subject to respond by pressing a key.
[jspsych&#8209;image&#8209;slider&#8209;response](jspsych-image-slider-response) | Display an image and allow the subject to respond by moving a slider to indicate a value.
[jspsych&#8209;instructions](jspsych-instructions) | For displaying instructions to the subject. Allows the subject to navigate between pages of instructions using keys or buttons.
[jspsych&#8209;maxdiff](jspsych-maxdiff) | Displays rows of alternatives to be selected for two mutually-exclusive categories, typically as 'most' or 'least' on a particular criteria (e.g. importance, preference, similarity). The participant responds by selecting one radio button corresponding to an alternative in both the left and right response columns.
[jspsych&#8209;preload](jspsych-preload) | This plugin loads images, audio, and video files into the browser's memory before they are needed in the experiment, in order to improve stimulus and response timing, and to avoid disrupting the flow of the experiment.
[jspsych&#8209;rdk](jspsych-rdk) | This plugin displays a Random Dot Kinematogram (RDK) and allows the subject to report the primary direction of motion by pressing a key on the keyboard.
[jspsych&#8209;reconstruction](jspsych-reconstruction) | The subject interacts with a stimulus by modifying a parameter of the stimulus and observing the change in the stimulus in real-time.
[jspsych&#8209;resize](jspsych-resize) | Calibrate the display so that materials display with a known physical size.
[jspsych&#8209;same&#8209;different&#8209;html](jspsych-same-different-html) | A same-different judgment task. An HTML-formatted stimulus is shown, followed by a brief gap, and then another stimulus is shown. The subject indicates whether the stimuli are the same or different.
[jspsych&#8209;same&#8209;different&#8209;image](jspsych-same-different-image) | A same-different judgment task. An image is shown, followed by a brief gap, and then another stimulus is shown. The subject indicates whether the stimuli are the same or different.
[jspsych&#8209;serial&#8209;reaction&#8209;time](jspsych-serial-reaction-time) | A set of boxes are displayed on the screen and one of them changes color. The subject presses a key that corresponds to the different color box as fast as possible.
[jspsych&#8209;serial&#8209;reaction&#8209;time&#8209;mouse](jspsych-serial-reaction-time-mouse) | A set of boxes are displayed on the screen and one of them changes color. The subjects clicks the box that changed color as fast as possible.
[jspsych&#8209;survey&#8209;html&#8209;form](jspsych-survey-html-form) | Renders a custom HTML form. Allows for mixing multiple kinds of form input.
[jspsych&#8209;survey&#8209;likert](jspsych-survey-likert) | Displays likert-style questions.
[jspsych&#8209;survey&#8209;multi&#8209;choice](jspsych-survey-multi-choice) | Displays multiple choice questions with one answer allowed per question.
[jspsych&#8209;survey&#8209;multi&#8209;select](jspsych-survey-multi-select) | Displays multiple choice questions with multiple answes allowed per question.
[jspsych&#8209;survey&#8209;text](jspsych-survey-text) | Shows a prompt with a text box. The subject writes a response and then submits by clicking a button.
[jspsych&#8209;video&#8209;button&#8209;response](jspsych-video-button-response) | Displays a video file with many options for customizing playback. Subject responds to the video by pressing a button.
[jspsych&#8209;video&#8209;keyboard&#8209;response](jspsych-video-keyboard-response) | Displays a video file with many options for customizing playback. Subject responds to the video by pressing a key.
[jspsych&#8209;video&#8209;slider&#8209;response](jspsych-video-slider-response) | Displays a video file with many options for customizing playback. Subject responds to the video by moving a slider.
[jspsych&#8209;virtual&#8209;chinrest](jspsych-virtual-chinrest) | An implementation of the "virutal chinrest" procedure developed by [Li, Joo, Yeatman, and Reinecke (2020)](https://doi.org/10.1038/s41598-019-57204-1). Calibrates the monitor to display items at a known physical size by having participants scale an image to be the same size as a physical credit card. Then uses a blind spot task to estimate the distance between the participant and the display.
[jspsych&#8209;visual&#8209;search&#8209;circle](jspsych-visual-search-circle) | A customizable visual-search task modelled after [Wang, Cavanagh, & Green (1994)](http://dx.doi.org/10.3758/BF03206946). The subject indicates whether or not a target is present among a set of distractors. The stimuli are displayed in a circle, evenly-spaced, equidistant from a fixation point.
[jspsych&#8209;vsl&#8209;animate&#8209;occlusion](jspsych-vsl-animate-occlusion) | A visual statistical learning paradigm based on [Fiser & Aslin (2002)](http://dx.doi.org/10.1037//0278-7393.28.3.458). A sequence of stimuli are shown in an oscillatory motion. An occluding rectangle is in the center of the display, and the stimuli change when they are behind the rectangle.
[jspsych&#8209;vsl&#8209;grid&#8209;scene](jspsych-vsl-grid-scene) | A visual statistical learning paradigm based on [Fiser & Aslin (2001)](http://dx.doi.org/10.1111/1467-9280.00392). A scene made up of individual stimuli arranged in a grid is shown. This plugin can also generate the HTML code to render the stimuli for use in other plugins.
[jspsych&#8209;webgazer&#8209;calibrate](jspsych-webgazer-calibrate) | Calibrates the WebGazer extension for eye tracking.
[jspsych&#8209;webgazer&#8209;init&#8209;camera](jspsych-webgazer-init-camera) | Initializes the camera and helps the participant center their face for eye tracking.
[jspsych&#8209;webgazer&#8209;validate](jspsych-webgazer-validate) | Performs validation to measure precision and accuracy of WebGazer eye tracking predictions.

2
docs/tutorials/hello-world.md
View File

@ -11,7 +11,7 @@ Start by downloading the jsPsych library. The most recent version can always be
*Note: the image below shows version 4.2, but the process is the same for the most recent version.*
![releasespage](/img/githubreleases.jpg)
![releasespage](../img/githubreleases.jpg)
!!! warning
We strongly recommend downloading the latest release of the code rather than downloading the zip file of the code via the *Big Green Button* on the GitHub site. Downloading the code via the *Big Green Button* may give you a copy of the library that is in development and contains bugs.

10
docs/tutorials/rt-task.md
View File

@ -37,7 +37,7 @@ All jsPsych experiments are defined by a timeline. The timeline is an array that
var timeline = [];
```
Let's greet the subject with a simple welcome message using the [jspsych-html-keyboard-response](/plugins/jspsych-html-keyboard-response.md) plugin.
Let's greet the subject with a simple welcome message using the [jspsych-html-keyboard-response](../plugins/jspsych-html-keyboard-response.md) plugin.
First, we create a trial that uses the `jspsych-html-keyboard-response` plugin and contains a simple string to show the subject.
@ -296,7 +296,7 @@ timeline.push(blue_trial, orange_trial);
Whenever we use media elements (images, audio, or video) in an experiment it is a good idea to preload them prior to needing them for a trial. By preloading media we ask the participant's browser to download the media ahead of needing it, so that when we do need to display or play it there is no lag from needing to download it.
We are going to use the [jspsych-preload plugin](/plugins/jspsych-preload.md) to preload the two images. The [media preloading section](/overview/media-preloading.md) goes into a lot of detail about various options for preloading and different ways that you can use this plugin. Here we are simply going to give the plugin a list of the files that we want to be preloaded.
We are going to use the [jspsych-preload plugin](../plugins/jspsych-preload.md) to preload the two images. The [media preloading section](../overview/media-preloading.md) goes into a lot of detail about various options for preloading and different ways that you can use this plugin. Here we are simply going to give the plugin a list of the files that we want to be preloaded.
First we need to add the preload plugin to our `<head>` section.
@ -662,7 +662,7 @@ var test_procedure = {
One aspect of the experiment that could be improved is the duration of the fixation cross. As the experiment stands right now, the timing of the circles appearing is very predictable. We can change that by using a different value for the `trial_duration` parameter in the `fixation` trial for each trial. But how can we do that and keep the simple code structure we have now where we only have to define the fixation trial once? One option would be to add another timeline variable, like `"fixation_duration"` and use that to control the timing. But another option is to specify the `trial_duration` parameter as a function. If a parameter is a function, jsPsych will execute the function every time the trial runs. That means that if the function returns different results probabilistically, we can get a different parameter value every time the trial runs.
To do that here, we'll use one of the built-in randomization methods in [jsPsych's randomization module](/core_library/jspsych-randomization.md). `jsPsych.randomization.sampleWithoutReplacement()` takes an array of items to sample from and generates a new array of length *N* by sampling without replacement.
To do that here, we'll use one of the built-in randomization methods in [jsPsych's randomization module](../core_library/jspsych-randomization.md). `jsPsych.randomization.sampleWithoutReplacement()` takes an array of items to sample from and generates a new array of length *N* by sampling without replacement.
```javascript
var fixation = {
@ -771,9 +771,9 @@ In the code above, we replaced the `trial_duration: 1000` parameter in `fixation
## Part 10: Displaying the data
We have created a complete, if simple, experiment at this point, so let's take a look at the data being generated. jsPsych has a built-in [function called `jsPsych.data.displayData()`](/core_library/jspsych-data.md#jspsychdatadisplaydata) that is useful for debugging your experiment. It will remove all of the information on the screen and replace it with the raw data collected so far. This isn't terribly useful when you are actually running an experiment, but it's nice for checking the data during development.
We have created a complete, if simple, experiment at this point, so let's take a look at the data being generated. jsPsych has a built-in [function called `jsPsych.data.displayData()`](../core_library/jspsych-data.md#jspsychdatadisplaydata) that is useful for debugging your experiment. It will remove all of the information on the screen and replace it with the raw data collected so far. This isn't terribly useful when you are actually running an experiment, but it's nice for checking the data during development.
We need the `displayData` function to execute when the experiment ends. One way to do this is to use the [`on_finish` callback function](/overview/callbacks.md#on_finish-experiment). This function will automatically execute once all the trials in the experiment are finished. We can specify a function to call in the `init` method.
We need the `displayData` function to execute when the experiment ends. One way to do this is to use the [`on_finish` callback function](../overview/callbacks.md#on_finish-experiment). This function will automatically execute once all the trials in the experiment are finished. We can specify a function to call in the `init` method.
```javascript
jsPsych.init({