# 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.md). For a narrative description of eye tracking with jsPsych, see the [eye tracking overview](/overview/eye-tracking.md). ## Parameters In addition to the [parameters available in all plugins](overview.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 ----------|------|---------------|------------ instructions | string | too long to put here | Instructions for the participant to follow. button_text | string | Continue | The text for the button that participants click to end the trial. ## Data Generated In addition to the [default data collected by all plugins](overview.md#data-collected-by-plugins), this plugin collects the following data for each trial. Name | Type | Value -----|------|------ No additional data collected. ## Example #### Parameterless use ```javascript var init_camera = { type: 'webgazer-init-camera' } ```