jsPsych as global variable

src/App/components/JsPsychExperiment.jsx

@@ -5,6 +5,7 @@ import React from "react";
 import { ENV } from "../../config/";
 import { buildTimeline, jsPsychOptions } from "../../experiment";
 import { initParticipant } from "../deployments/firebase";
+import { getJsPsych } from "../../lib/utils";
 
 // ID used to identify the DOM element that holds the experiment.
 const EXPERIMENT_ID = "experiment-window";
@@ -67,8 +68,10 @@ export default function JsPsychExperiment({
    */
   React.useEffect(() => {
     if (jsPsych) {
-      const timeline = buildTimeline(jsPsych, studyID, participantID);
-      jsPsych.run(timeline);
+      // set up jsPsych object as global variable
+      window.jsPsych = jsPsych;
+      const timeline = buildTimeline(studyID, participantID);
+      getJsPsych().run(timeline);
     }
   }, [jsPsych]);
 

src/experiment/honeycomb.js

@@ -31,21 +31,20 @@ export const honeycombOptions = {
  * Take a look at how the code here compares to the jsPsych documentation!
  * See the jsPsych documentation for more: https://www.jspsych.org/7.3/tutorials/rt-task/
  *
- * @param {Object} jsPsych The jsPsych instance being used to run the task
  * @returns {Object} A jsPsych timeline object
  */
-export function buildHoneycombTimeline(jsPsych) {
+export const buildHoneycombTimeline = () => {
   // Build the trials that make up the start procedure
-  const startProcedure = buildStartProcedure(jsPsych);
+  const startProcedure = buildStartProcedure();
 
   // Build the trials that make up the task procedure
-  const honeycombProcedure = buildHoneycombProcedure(jsPsych);
+  const honeycombProcedure = buildHoneycombProcedure();
 
   // Builds the trial needed to debrief the participant on their performance
-  const debriefTrial = buildDebriefTrial(jsPsych);
+  const debriefTrial = buildDebriefTrial;
 
   // Builds the trials that make up the end procedure
-  const endProcedure = buildEndProcedure(jsPsych);
+  const endProcedure = buildEndProcedure();
 
   const timeline = [
     startProcedure,
@@ -56,4 +55,4 @@ export function buildHoneycombTimeline(jsPsych) {
     endProcedure,
   ];
   return timeline;
-}
+};

src/experiment/index.js

@@ -25,13 +25,13 @@ export const jsPsychOptions = honeycombOptions;
  * @param {string} participantID The ID of the participant that was just logged in
  * @returns The timeline for JsPsych to run
  */
-export function buildTimeline(jsPsych, studyID, participantID) {
+export function buildTimeline(studyID, participantID) {
   console.log(`Building timeline for participant ${participantID} on study ${studyID}`);
 
   /**
    * ! Your timeline should be built in a newly created function, not this one
    * https://brown-ccv.github.io/honeycomb-docs/docs/quick_start#2-add-a-file-for-the-task
    */
-  const timeline = buildHoneycombTimeline(jsPsych);
+  const timeline = buildHoneycombTimeline();
   return timeline;
 }

src/experiment/procedures/endProcedure.js

@@ -8,20 +8,19 @@ import { exitFullscreenTrial } from "../trials/fullscreen";
  * 1) Trial used to complete the user's camera recording is displayed
  * 2) The experiment exits fullscreen
  *
- * @param {Object} jsPsych The jsPsych instance being used to run the task
  * @returns {Object} A jsPsych (nested) timeline object
  */
-export function buildEndProcedure(jsPsych) {
+export const buildEndProcedure = () => {
   const procedure = [];
 
   // Conditionally add the camera breakdown trials
   if (ENV.USE_CAMERA) {
-    procedure.push(buildCameraEndTrial(jsPsych));
+    procedure.push(buildCameraEndTrial);
   }
 
   // Add the other trials needed to end the experiment
   procedure.push(exitFullscreenTrial, conclusionTrial);
 
   // Return the block as a nested timeline
   return { timeline: procedure };
-}
+};

src/experiment/procedures/honeycombProcedure.js

@@ -4,6 +4,7 @@ import { ENV, SETTINGS } from "../../config/";
 import { eventCodes } from "../../config/trigger";
 import { pdSpotEncode, photodiodeGhostBox } from "../../lib/markup/photodiode";
 import { buildFixationTrial } from "../trials/fixation";
+import { getJsPsych } from "../../lib/utils";
 
 /**
  * Builds the block of trials that form the core of the Honeycomb experiment
@@ -12,14 +13,11 @@ import { buildFixationTrial } from "../trials/fixation";
  *
  * Note that the block is conditionally rendered and repeated based on the task settings
  *
- * @param {Object} jsPsych The jsPsych instance being used to run the task
  * @returns {Object} A jsPsych (nested) timeline object
  */
-export function buildHoneycombProcedure(jsPsych) {
+export const buildHoneycombProcedure = () => {
   const honeycombSettings = SETTINGS.honeycomb;
-
-  const fixationTrial = buildFixationTrial(jsPsych);
-
+  const fixationTrial = buildFixationTrial;
   /**
    * Displays a colored circle and waits for participant to response with a keyboard press
    *
@@ -31,7 +29,7 @@ export function buildHoneycombProcedure(jsPsych) {
   const taskTrial = {
     type: imageKeyboardResponse,
     // Display the image passed as a timeline variable
-    stimulus: jsPsych.timelineVariable("stimulus"),
+    stimulus: getJsPsych().timelineVariable("stimulus"),
     prompt: function () {
       // Conditionally displays the photodiodeGhostBox
       if (ENV.USE_PHOTODIODE) return photodiodeGhostBox;
@@ -42,15 +40,15 @@ export function buildHoneycombProcedure(jsPsych) {
     data: {
       // Record the correct_response passed as a timeline variable
       code: eventCodes.honeycomb,
-      correct_response: jsPsych.timelineVariable("correct_response"),
+      correct_response: getJsPsych().timelineVariable("correct_response"),
     },
     on_load: function () {
       // Conditionally flashes the photodiode when the trial first loads
       if (ENV.USE_PHOTODIODE) pdSpotEncode(eventCodes.honeycomb);
     },
     // Add a boolean value ("correct") to the data - if the user responded with the correct key or not
     on_finish: function (data) {
-      data.correct = jsPsych.pluginAPI.compareKeys(data.response, data.correct_response);
+      data.correct = getJsPsych().pluginAPI.compareKeys(data.response, data.correct_response);
     },
   };
 
@@ -70,4 +68,4 @@ export function buildHoneycombProcedure(jsPsych) {
     timeline: [fixationTrial, taskTrial],
   };
   return honeycombBlock;
-}
+};

src/experiment/procedures/startProcedure.js

@@ -15,10 +15,9 @@ import { introductionTrial } from "../trials/introduction";
  * 4) Trials used to set up a photodiode and trigger box are displayed (if applicable)
  * 5) Trials used to set up the user's camera are displayed (if applicable)
  *
- * @param {Object} jsPsych The jsPsych instance being used to run the task
  * @returns {Object} A jsPsych (nested) timeline object
  */
-export function buildStartProcedure(jsPsych) {
+export const buildStartProcedure = () => {
   const procedure = [nameTrial, enterFullscreenTrial, introductionTrial];
 
   // Conditionally add the photodiode setup trials
@@ -29,9 +28,9 @@ export function buildStartProcedure(jsPsych) {
 
   // Conditionally add the camera setup trials
   if (ENV.USE_CAMERA) {
-    procedure.push(buildCameraStartTrial(jsPsych));
+    procedure.push(buildCameraStartTrial);
   }
 
   // Return the block as a nested timeline
   return { timeline: procedure };
-}
+};

src/experiment/trials/camera.js

@@ -4,116 +4,112 @@ import initializeCamera from "@jspsych/plugin-initialize-camera";
 
 import { LANGUAGE, ENV } from "../../config/";
 import { div, h1, p, tag } from "../../lib/markup/tags";
+import { getJsPsych } from "../../lib/utils";
 
 const WEBCAM_ID = "webcam";
 
 /**
  * A trial that begins recording the participant using their computer's default camera
- * @param {Object} jsPsych The jsPsych instance being used to run the task
- * @returns {Object} A jsPsych trial object
+ *
+ * @type {Object} A jsPsych trial object
  */
-// TODO @brown-ccv #301: Use jsPsych extension, deprecate this function
+// TODO @brown-ccv #301: Use jsPsych extension, deprecate this variable
 // TODO @brown-ccv #343: We should be able to make this work on both electron and browser?
 // TODO @brown-ccv #301: Rolling save to the deployment (webm is a subset of mkv)
-export function buildCameraStartTrial(jsPsych) {
-  return {
-    timeline: [
-      {
-        // Prompts user permission for camera device
-        type: initializeCamera,
-        include_audio: true,
-        mime_type: "video/webm",
+export const buildCameraStartTrial = {
+  timeline: [
+    {
+      // Prompts user permission for camera device
+      type: initializeCamera,
+      include_audio: true,
+      mime_type: "video/webm",
+    },
+    {
+      // Helps participant center themselves inside the camera
+      type: htmlButtonResponse,
+      stimulus: function () {
+        const videoMarkup = tag("video", "", {
+          id: WEBCAM_ID,
+          width: 640,
+          height: 480,
+          autoplay: true,
+        });
+        const cameraStartMarkup = p(LANGUAGE.trials.camera.start);
+        const trialMarkup = div(cameraStartMarkup + videoMarkup, {
+          class: "align-items-center-col",
+        });
+        return div(trialMarkup);
       },
-      {
-        // Helps participant center themselves inside the camera
-        type: htmlButtonResponse,
-        stimulus: function () {
-          const videoMarkup = tag("video", "", {
-            id: WEBCAM_ID,
-            width: 640,
-            height: 480,
-            autoplay: true,
-          });
-          const cameraStartMarkup = p(LANGUAGE.trials.camera.start);
-          const trialMarkup = div(cameraStartMarkup + videoMarkup, {
-            class: "align-items-center-col",
-          });
-          return div(trialMarkup);
-        },
-        choices: [LANGUAGE.prompts.continue.button],
-        response_ends_trial: true,
-        on_start: function () {
-          // Initialize and store the camera feed
-          if (!ENV.USE_ELECTRON) {
-            throw new Error("video recording is only available when running inside Electron");
-          }
+      choices: [LANGUAGE.prompts.continue.button],
+      response_ends_trial: true,
+      on_start: function () {
+        // Initialize and store the camera feed
+        if (!ENV.USE_ELECTRON) {
+          throw new Error("video recording is only available when running inside Electron");
+        }
 
-          const cameraRecorder = jsPsych.pluginAPI.getCameraRecorder();
-          if (!cameraRecorder) {
-            console.error("Camera is not initialized, no data will be recorded.");
-            return;
-          }
-          const cameraChunks = [];
+        const cameraRecorder = getJsPsych().pluginAPI.getCameraRecorder();
+        if (!cameraRecorder) {
+          console.error("Camera is not initialized, no data will be recorded.");
+          return;
+        }
+        const cameraChunks = [];
 
-          // Push data whenever available
-          cameraRecorder.addEventListener("dataavailable", (event) => {
-            if (event.data.size > 0) cameraChunks.push(event.data);
-          });
+        // Push data whenever available
+        cameraRecorder.addEventListener("dataavailable", (event) => {
+          if (event.data.size > 0) cameraChunks.push(event.data);
+        });
 
-          // Saves the raw data feed from the participants camera (executed on cameraRecorder.stop()).
-          cameraRecorder.addEventListener("stop", () => {
-            const blob = new Blob(cameraChunks, { type: cameraRecorder.mimeType });
+        // Saves the raw data feed from the participants camera (executed on cameraRecorder.stop()).
+        cameraRecorder.addEventListener("stop", () => {
+          const blob = new Blob(cameraChunks, { type: cameraRecorder.mimeType });
 
-            // Pass video data to Electron as a base64 encoded string
-            const reader = new FileReader();
-            reader.readAsDataURL(blob);
-            reader.onloadend = () => {
-              window.electronAPI.saveVideo(reader.result);
-            };
-          });
-        },
-        on_load: function () {
-          // Assign camera feed to the <video> element
-          const camera = document.getElementById(WEBCAM_ID);
+          // Pass video data to Electron as a base64 encoded string
+          const reader = new FileReader();
+          reader.readAsDataURL(blob);
+          reader.onloadend = () => {
+            window.electronAPI.saveVideo(reader.result);
+          };
+        });
+      },
+      on_load: function () {
+        // Assign camera feed to the <video> element
+        const camera = document.getElementById(WEBCAM_ID);
 
-          camera.srcObject = jsPsych.pluginAPI.getCameraRecorder().stream;
-        },
-        on_finish: function () {
-          // Begin video recording
-          jsPsych.pluginAPI.getCameraRecorder().start();
-        },
+        camera.srcObject = getJsPsych().pluginAPI.getCameraRecorder().stream;
+      },
+      on_finish: function () {
+        // Begin video recording
+        getJsPsych().pluginAPI.getCameraRecorder().start();
       },
-    ],
-  };
-}
+    },
+  ],
+};
+
+const recordingEndMarkup = h1(LANGUAGE.trials.camera.end);
 
 /**
  * A trial that finishes recording the participant using their computer's default camera
  *
- * @param {Number} duration How long to show the trial for
- * @returns {Object} A jsPsych trial object
+ * @type {Object} A jsPsych trial object
  */
-export function buildCameraEndTrial(jsPsych) {
-  const recordingEndMarkup = h1(LANGUAGE.trials.camera.end);
+export const buildCameraEndTrial = {
+  type: htmlKeyboardResponse,
+  stimulus: div(recordingEndMarkup),
+  trial_duration: 5000,
+  on_start: function () {
+    // Complete the camera recording
 
-  return {
-    type: htmlKeyboardResponse,
-    stimulus: div(recordingEndMarkup),
-    trial_duration: 5000,
-    on_start: function () {
-      // Complete the camera recording
+    if (!ENV.USE_ELECTRON) {
+      throw new Error("video recording is only available when running inside Electron");
+    }
 
-      if (!ENV.USE_ELECTRON) {
-        throw new Error("video recording is only available when running inside Electron");
-      }
+    const cameraRecorder = getJsPsych().pluginAPI.getCameraRecorder();
+    if (!cameraRecorder) {
+      console.error("Camera is not initialized, no data will be recorded.");
+      return;
+    }
 
-      const cameraRecorder = jsPsych.pluginAPI.getCameraRecorder();
-      if (!cameraRecorder) {
-        console.error("Camera is not initialized, no data will be recorded.");
-        return;
-      }
-
-      cameraRecorder.stop();
-    },
-  };
-}
+    cameraRecorder.stop();
+  },
+};