Skip to content

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 subject while they are viewing the animation.
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.
audio‑keyboard‑response Play an audio file and allow the subject to respond by pressing a key.
audio‑slider‑response Play an audio file and allow the subject 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 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.
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 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).
categorize‑animation The subject responds to an animation and can be given feedback about their response.
categorize‑html The subject responds to an HTML-formatted stimulus using the keyboard and can be given feedback about the correctness of their response.
categorize‑image The subject 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 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.
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.
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 subject 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 subject to respond by pressing a key.
html‑slider‑response Display an HTML-formatted stimulus and allow the subject 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 subject 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 subject to respond by pressing a key.
image‑slider‑response Display an image and allow the subject to respond by moving a slider to indicate a value.
initialize‑camera Request permission to use the subject's camera to record video and allows the subject 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 subject's microphone to record audio and allows the subject to choose which microphone to use if multiple devices are enabled.
instructions For displaying instructions to the subject. Allows the subject 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 subject 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 subject 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 subject 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 subject 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 subjects 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 subject writes a response and then submits by clicking a button.
video‑button‑response Displays a video file with many options for customizing playback. Subject responds to the video by pressing a button.
video‑keyboard‑response Displays a video file with many options for customizing playback. Subject responds to the video by pressing a key.
video‑slider‑response Displays a video file with many options for customizing playback. Subject 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 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.
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.