List of Plugins

These are the plugins that are included in the jsPsych release.

Additional plugins may be available in the community contributions repository.

For an overview of what plugins are and how they work, see our plugins overview.

Plugin	Description
animation	Shows a sequence of images at a specified frame rate. Records key presses (including timing information) made by the participant while they are viewing the animation.
audio‑button‑response	Play an audio file and allow the participant to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
audio‑keyboard‑response	Play an audio file and allow the participant to respond by pressing a key.
audio‑slider‑response	Play an audio file and allow the participant to respond by moving a slider to indicate a value.
browser‑check	Measures various features of the participant's browser and runs an inclusion check to see if the browser meets a custom set of criteria for running the study.
call‑function	Executes an arbitrary function call. Doesn't display anything to the participant, and the participant 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.
canvas‑button‑response	Draw a stimulus on a HTML canvas element, 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).
canvas‑keyboard‑response	Draw a stimulus on a HTML canvas element, 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).
canvas‑slider‑response	Draw a stimulus on a HTML canvas element, and ask the participant 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).
categorize‑animation	The participant responds to an animation and can be given feedback about their response.
categorize‑html	The participant responds to an HTML-formatted stimulus using the keyboard and can be given feedback about the correctness of their response.
categorize‑image	The participant responds to an image using the keyboard and can be given feedback about the correctness of their response.
cloze	Plugin for displaying a cloze test and checking participants answers against a correct solution.
external‑html	Displays an external HTML page (such as a consent form) and lets the participant respond by clicking a button or pressing a key. Plugin can validate their response, which is useful for making sure that a participant has granted consent before starting the experiment.
free‑sort	Displays a set of images on the screen in random locations. Participants can click and drag the images to move them around the screen. Records all the moves made by the participant, so the sequence of moves can be recovered from the data.
fullscreen	Toggles the experiment in and out of fullscreen mode.
html‑audio‑response	Display an HTML-formatted stimulus and records an audio response via a microphone.
html‑button‑response	Display an HTML-formatted stimulus and allow the participant to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
html‑keyboard‑response	Display an HTML-formatted stimulus and allow the participant to respond by pressing a key.
html‑slider‑response	Display an HTML-formatted stimulus and allow the participant to respond by moving a slider to indicate a value.
html‑video‑response	Display an HTML-formatted stimulus and records video data via a webcam.
iat‑html	The implicit association task, using HTML-formatted stimuli.
iat‑image	The implicit association task, using images as stimuli.
image‑button‑response	Display an image and allow the participant to respond by choosing a button to click. The button can be customized extensively, e.g., using images in place of standard buttons.
image‑keyboard‑response	Display an image and allow the participant to respond by pressing a key.
image‑slider‑response	Display an image and allow the participant to respond by moving a slider to indicate a value.
initialize‑camera	Request permission to use the participant's camera to record video and allows the participant to choose which camera to use if multiple devices are enabled. Also allows setting the mime type of the recorded video.
initialize‑microphone	Request permission to use the participant's microphone to record audio and allows the participant to choose which microphone to use if multiple devices are enabled.
instructions	For displaying instructions to the participant. Allows the participant to navigate between pages of instructions using keys or buttons.
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.
mirror‑camera	Shows a live feed of the participant's camera on the screen.
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.
reconstruction	The participant interacts with a stimulus by modifying a parameter of the stimulus and observing the change in the stimulus in real-time.
resize	Calibrate the display so that materials display with a known physical size.
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 participant indicates whether the stimuli are the same or different.
same‑different‑image	A same-different judgment task. An image is shown, followed by a brief gap, and then another stimulus is shown. The participant indicates whether the stimuli are the same or different.
serial‑reaction‑time	A set of boxes are displayed on the screen and one of them changes color. The participant presses a key that corresponds to the different color box as fast as possible.
serial‑reaction‑time‑mouse	A set of boxes are displayed on the screen and one of them changes color. The participants clicks the box that changed color as fast as possible.
sketchpad	Creates an interactive canvas that the participant can draw on using their mouse or touchscreen.
survey‑html‑form	Renders a custom HTML form. Allows for mixing multiple kinds of form input.
survey‑likert	Displays likert-style questions.
survey‑multi‑choice	Displays multiple choice questions with one answer allowed per question.
survey‑multi‑select	Displays multiple choice questions with multiple answes allowed per question.
survey‑text	Shows a prompt with a text box. The participant writes a response and then submits by clicking a button.
video‑button‑response	Displays a video file with many options for customizing playback. participant responds to the video by pressing a button.
video‑keyboard‑response	Displays a video file with many options for customizing playback. participant responds to the video by pressing a key.
video‑slider‑response	Displays a video file with many options for customizing playback. participant responds to the video by moving a slider.
virtual‑chinrest	An implementation of the "virutal chinrest" procedure developed by Li, Joo, Yeatman, and Reinecke (2020). 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.
visual‑search‑circle	A customizable visual-search task modelled after Wang, Cavanagh, & Green (1994). The participant 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.
webgazer‑calibrate	Calibrates the WebGazer extension for eye tracking.
webgazer‑init‑camera	Initializes the camera and helps the participant center their face for eye tracking.
webgazer‑validate	Performs validation to measure precision and accuracy of WebGazer eye tracking predictions.