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61 lines
3.2 KiB
Markdown
61 lines
3.2 KiB
Markdown
# jspsych-survey-multi-select plugin
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The survey-multi-select plugin displays a set of questions with multiple choice response fields. The subject selects a single answer.
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## Parameters
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This table lists the parameters associated with this plugin. Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.
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Parameter | Type | Default Value | Description
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----------|------|---------------|------------
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questions | array | *undefined* | An array of strings. The strings are the prompts/questions that will be associated with a group of options (check boxes). All questions will get presented on the same page (trial).
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options | array | *undefined* | An array of arrays. The innermost arrays contain a set of options to display for an individual question. The length of the outer array should be the same as the number of questions.
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horizontal | boolean | false | If true, then questions are centered and options are displayed horizontally.
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preamble | string | empty string | HTML formatted string to display at the top of the page above all the questions.
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[1]: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#Browser_compatibility
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## Data Generated
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In addition to the [default data collected by all plugins](overview#datacollectedbyplugins), this plugin collects the following data for each trial.
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Name | Type | Value
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-----|------|------
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responses | JSON string | An array containing all selected choices in JSON format for each question. The encoded object will have a separate variable for the response to each question, with the first question in the trial being recorded in `Q0`, the second in `Q1`, and so on. The responses are recorded as the name of the option label.
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rt | numeric | The response time in milliseconds for the subject to make a response. The time is measured from when the questions first appear on the screen until the subject's response.
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## Examples
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#### Basic example with multiple questions on a page.
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```javascript
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// defining groups of questions that will go together.
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var page_1_questions = ["I like vegetables.", "I like fruit."];
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// definiting two different response scales that can be used.
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var page_1_options = ["Strongly Disagree", "Disagree", "Neutral", "Agree", "Strongly Agree"];
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var page_2_options = ["Strongly Disagree", "Disagree", "Somewhat Disagree", "Neural", "Somewhat Agree", "Agree", "Strongly Agree"];
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var multi_choice_block = {
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type: 'survey-multi-select',
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questions: page_1_questions,
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options: [page_1_options, page_2_options], // need one scale for every question on a page
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required: [true, false] // set whether questions are required
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};
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var multi_choice_block_horizontal = {
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type: 'survey-multi-select',
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questions: page_1_questions,
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options: [page_1_options, page_2_options], // need one scale for every question on a page
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required: [true, false], // set whether questions are required
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horizontal: true // centres questions and makes options display horizontally
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};
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jsPsych.init({
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timeline: [multi_choice_block, multi_choice_block_horizontal],
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on_finish: function() {
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jsPsych.data.displayData();
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}
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});
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```
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