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psychojs/docs/data_MultiStairHandler.js.html
Alain Pitiot 858bbb067c improved survey stimulus
2022-09-12 13:20:16 +02:00

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href="ButtonStim.html#setText">setText</a></li></ul></li><li><a href="Clock.html">Clock</a><ul class='methods'><li data-type='method'><a href="Clock.html#add">add</a></li><li data-type='method'><a href="Clock.html#getLastResetTime">getLastResetTime</a></li><li data-type='method'><a href="Clock.html#getTime">getTime</a></li><li data-type='method'><a href="Clock.html#reset">reset</a></li></ul></li><li><a href="Color.html">Color</a><ul class='methods'><li data-type='method'><a href="Color.html#toString">toString</a></li></ul></li><li><a href="CountdownTimer.html">CountdownTimer</a><ul class='methods'><li data-type='method'><a href="CountdownTimer.html#add">add</a></li><li data-type='method'><a href="CountdownTimer.html#getLastResetTime">getLastResetTime</a></li><li data-type='method'><a href="CountdownTimer.html#getTime">getTime</a></li><li data-type='method'><a href="CountdownTimer.html#reset">reset</a></li></ul></li><li><a href="EventEmitter.html">EventEmitter</a><ul class='methods'><li 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href="EventManager.html#startMoveClock">startMoveClock</a></li><li data-type='method'><a href="EventManager.html#stopMoveClock">stopMoveClock</a></li></ul></li><li><a href="ExperimentHandler.html">ExperimentHandler</a><ul class='methods'><li data-type='method'><a href="ExperimentHandler.html#addData">addData</a></li><li data-type='method'><a href="ExperimentHandler.html#addLoop">addLoop</a></li><li data-type='method'><a href="ExperimentHandler.html#isEntryEmpty">isEntryEmpty</a></li><li data-type='method'><a href="ExperimentHandler.html#nextEntry">nextEntry</a></li><li data-type='method'><a href="ExperimentHandler.html#removeLoop">removeLoop</a></li><li data-type='method'><a href="ExperimentHandler.html#save">save</a></li></ul></li><li><a href="FaceDetector.html">FaceDetector</a><ul class='methods'><li data-type='method'><a href="FaceDetector.html#_estimateBoundingBox">_estimateBoundingBox</a></li><li data-type='method'><a href="FaceDetector.html#_initFaceApi">_initFaceApi</a></li><li 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href="Form.html#setAutoDraw">setAutoDraw</a></li><li data-type='method'><a href="Form.html#setDepth">setDepth</a></li><li data-type='method'><a href="Form.html#setOri">setOri</a></li><li data-type='method'><a href="Form.html#setPos">setPos</a></li><li data-type='method'><a href="Form.html#setSize">setSize</a></li></ul></li><li><a href="GratingStim.html">GratingStim</a><ul class='methods'><li data-type='method'><a href="GratingStim.html#_estimateBoundingBox">_estimateBoundingBox</a></li><li data-type='method'><a href="GratingStim.html#_getDisplaySize">_getDisplaySize</a></li><li data-type='method'><a href="GratingStim.html#_getPixiMeshFromPredefinedShaders">_getPixiMeshFromPredefinedShaders</a></li><li data-type='method'><a href="GratingStim.html#_updateIfNeeded">_updateIfNeeded</a></li><li data-type='method'><a href="GratingStim.html#setBlendmode">setBlendmode</a></li><li data-type='method'><a href="GratingStim.html#setColor">setColor</a></li><li data-type='method'><a href="GratingStim.html#setColorSpace">setColorSpace</a></li><li data-type='method'><a href="GratingStim.html#setInterpolate">setInterpolate</a></li><li data-type='method'><a href="GratingStim.html#setMask">setMask</a></li><li data-type='method'><a href="GratingStim.html#setOpacity">setOpacity</a></li><li data-type='method'><a href="GratingStim.html#setPhase">setPhase</a></li><li data-type='method'><a href="GratingStim.html#setSF">setSF</a></li><li data-type='method'><a href="GratingStim.html#setTex">setTex</a></li></ul></li><li><a href="GUI.html">GUI</a><ul class='methods'><li data-type='method'><a href="GUI.html#_onCancelExperiment">_onCancelExperiment</a></li><li data-type='method'><a href="GUI.html#_onResourceEvents">_onResourceEvents</a></li><li data-type='method'><a href="GUI.html#_onStartExperiment">_onStartExperiment</a></li><li data-type='method'><a href="GUI.html#_setProgressMessage">_setProgressMessage</a></li><li data-type='method'><a href="GUI.html#_updateDialog">_updateDialog</a></li><li data-type='method'><a href="GUI.html#_updateProgressBar">_updateProgressBar</a></li><li data-type='method'><a href="GUI.html#_userFriendlyError">_userFriendlyError</a></li><li data-type='method'><a href="GUI.html#closeDialog">closeDialog</a></li><li data-type='method'><a href="GUI.html#dialog">dialog</a></li><li data-type='method'><a href="GUI.html#DlgFromDict">DlgFromDict</a></li><li data-type='method'><a href="GUI.html#finishDialog">finishDialog</a></li></ul></li><li><a href="ImageStim.html">ImageStim</a><ul class='methods'><li data-type='method'><a href="ImageStim.html#_estimateBoundingBox">_estimateBoundingBox</a></li><li data-type='method'><a href="ImageStim.html#_getDisplaySize">_getDisplaySize</a></li><li data-type='method'><a href="ImageStim.html#_updateIfNeeded">_updateIfNeeded</a></li><li data-type='method'><a href="ImageStim.html#setImage">setImage</a></li><li data-type='method'><a href="ImageStim.html#setInterpolate">setInterpolate</a></li><li data-type='method'><a href="ImageStim.html#setMask">setMask</a></li></ul></li><li><a href="Keyboard.html">Keyboard</a><ul class='methods'><li data-type='method'><a href="Keyboard.html#_addKeyListeners">_addKeyListeners</a></li><li data-type='method'><a href="Keyboard.html#clearEvents">clearEvents</a></li><li data-type='method'><a href="Keyboard.html#getEvents">getEvents</a></li><li data-type='method'><a href="Keyboard.html#getKeys">getKeys</a></li><li data-type='method'><a href="Keyboard.html#start">start</a></li><li data-type='method'><a href="Keyboard.html#stop">stop</a></li></ul></li><li><a href="KeyPress.html">KeyPress</a></li><li><a href="Logger.html">Logger</a><ul class='methods'><li data-type='method'><a href="Logger.html#_customConsoleLayout">_customConsoleLayout</a></li><li data-type='method'><a href="Logger.html#_getValue">_getValue</a></li><li data-type='method'><a href="Logger.html#_throttle">_throttle</a></li><li data-type='method'><a href="Logger.html#data">data</a></li><li data-type='method'><a href="Logger.html#exp">exp</a></li><li data-type='method'><a href="Logger.html#flush">flush</a></li><li data-type='method'><a href="Logger.html#log">log</a></li><li data-type='method'><a href="Logger.html#setLevel">setLevel</a></li></ul></li><li><a href="Microphone.html">Microphone</a><ul class='methods'><li data-type='method'><a href="Microphone.html#_onChange">_onChange</a></li><li data-type='method'><a href="Microphone.html#_prepareRecording">_prepareRecording</a></li><li data-type='method'><a href="Microphone.html#download">download</a></li><li data-type='method'><a href="Microphone.html#flush">flush</a></li><li data-type='method'><a href="Microphone.html#getRecording">getRecording</a></li><li data-type='method'><a href="Microphone.html#pause">pause</a></li><li data-type='method'><a href="Microphone.html#resume">resume</a></li><li data-type='method'><a href="Microphone.html#start">start</a></li><li data-type='method'><a href="Microphone.html#stop">stop</a></li><li data-type='method'><a href="Microphone.html#upload">upload</a></li></ul></li><li><a href="MinimalStim.html">MinimalStim</a><ul class='methods'><li data-type='method'><a href="MinimalStim.html#_updateIfNeeded">_updateIfNeeded</a></li><li data-type='method'><a href="MinimalStim.html#contains">contains</a></li><li data-type='method'><a href="MinimalStim.html#draw">draw</a></li><li data-type='method'><a href="MinimalStim.html#hide">hide</a></li><li data-type='method'><a href="MinimalStim.html#release">release</a></li><li data-type='method'><a href="MinimalStim.html#setAutoDraw">setAutoDraw</a></li></ul></li><li><a href="module-core.PsychoJS.html">PsychoJS</a><ul class='methods'><li data-type='method'><a href="module-core.PsychoJS.html#_captureErrors">_captureErrors</a></li><li data-type='method'><a href="module-core.PsychoJS.html#_configure">_configure</a></li><li data-type='method'><a href="module-core.PsychoJS.html#_getParticipantIPInfo">_getParticipantIPInfo</a></li><li data-type='method'><a href="module-core.PsychoJS.html#_makeStatusTopLevel">_makeStatusTopLevel</a></li><li data-type='method'><a href="module-core.PsychoJS.html#getEnvironment">getEnvironment</a></li><li data-type='method'><a href="module-core.PsychoJS.html#importAttributes">importAttributes</a></li><li data-type='method'><a href="module-core.PsychoJS.html#openWindow">openWindow</a></li><li data-type='method'><a href="module-core.PsychoJS.html#quit">quit</a></li><li data-type='method'><a href="module-core.PsychoJS.html#schedule">schedule</a></li><li data-type='method'><a href="module-core.PsychoJS.html#scheduleCondition">scheduleCondition</a></li><li data-type='method'><a href="module-core.PsychoJS.html#setRedirectUrls">setRedirectUrls</a></li><li data-type='method'><a href="module-core.PsychoJS.html#start">start</a></li><li data-type='method'><a href="module-core.PsychoJS.html#waitForResources">waitForResources</a></li></ul></li><li><a href="module-data.TrialHandler.html">TrialHandler</a><ul class='methods'><li data-type='method'><a href="module-data.TrialHandler.html#_prepareSequence">_prepareSequence</a></li><li data-type='method'><a href="module-data.TrialHandler.html#_prepareTrialList">_prepareTrialList</a></li><li data-type='method'><a href="module-data.TrialHandler.html#addData">addData</a></li><li data-type='method'><a href="module-data.TrialHandler.html#forEach">forEach</a></li><li data-type='method'><a href="module-data.TrialHandler.html#getAttributes">getAttributes</a></li><li data-type='method'><a href="module-data.TrialHandler.html#getCurrentTrial">getCurrentTrial</a></li><li data-type='method'><a href="module-data.TrialHandler.html#getEarlierTrial">getEarlierTrial</a></li><li data-type='method'><a href="module-data.TrialHandler.html#getFutureTrial">getFutureTrial</a></li><li data-type='method'><a href="module-data.TrialHandler.html#getSnapshot">getSnapshot</a></li><li data-type='method'><a href="module-data.TrialHandler.html#getTrial">getTrial</a></li><li data-type='method'><a href="module-data.TrialHandler.html#getTrialIndex">getTrialIndex</a></li><li data-type='method'><a href="module-data.TrialHandler.html#next">next</a></li><li data-type='method'><a href="module-data.TrialHandler.html#setSeed">setSeed</a></li><li data-type='method'><a href="module-data.TrialHandler.html#setTrialIndex">setTrialIndex</a></li><li data-type='method'><a href="module-data.TrialHandler.html#Symbol.iterator">Symbol.iterator</a></li></ul></li><li><a href="module-hardware.Camera.html">Camera</a><ul class='methods'><li data-type='method'><a href="module-hardware.Camera.html#_onChange">_onChange</a></li><li data-type='method'><a href="module-hardware.Camera.html#_prepareRecording">_prepareRecording</a></li><li data-type='method'><a href="module-hardware.Camera.html#_upload">_upload</a></li><li data-type='method'><a href="module-hardware.Camera.html#authorize">authorize</a></li><li data-type='method'><a href="module-hardware.Camera.html#close">close</a></li><li data-type='method'><a href="module-hardware.Camera.html#flush">flush</a></li><li data-type='method'><a href="module-hardware.Camera.html#getRecording">getRecording</a></li><li data-type='method'><a href="module-hardware.Camera.html#getStream">getStream</a></li><li data-type='method'><a href="module-hardware.Camera.html#getVideo">getVideo</a></li><li data-type='method'><a href="module-hardware.Camera.html#isReady">isReady</a></li><li data-type='method'><a href="module-hardware.Camera.html#open">open</a></li><li data-type='method'><a href="module-hardware.Camera.html#pause">pause</a></li><li data-type='method'><a href="module-hardware.Camera.html#record">record</a></li><li data-type='method'><a href="module-hardware.Camera.html#resume">resume</a></li><li data-type='method'><a href="module-hardware.Camera.html#stop">stop</a></li></ul></li><li><a href="module-sound.Sound.html">Sound</a><ul class='methods'><li data-type='method'><a href="module-sound.Sound.html#_getPlayer">_getPlayer</a></li><li data-type='method'><a href="module-sound.Sound.html#getDuration">getDuration</a></li><li data-type='method'><a href="module-sound.Sound.html#play">play</a></li><li data-type='method'><a href="module-sound.Sound.html#setLoops">setLoops</a></li><li data-type='method'><a href="module-sound.Sound.html#setSecs">setSecs</a></li><li data-type='method'><a href="module-sound.Sound.html#setSound">setSound</a></li><li data-type='method'><a href="module-sound.Sound.html#setVolume">setVolume</a></li><li data-type='method'><a href="module-sound.Sound.html#stop">stop</a></li></ul></li><li><a href="module-util.PsychObject.html">PsychObject</a><ul class='methods'><li data-type='method'><a href="module-util.PsychObject.html#_addAttribute">_addAttribute</a></li><li data-type='method'><a href="module-util.PsychObject.html#_setAttribute">_setAttribute</a></li><li data-type='method'><a href="module-util.PsychObject.html#emit">emit</a></li><li data-type='method'><a href="module-util.PsychObject.html#off">off</a></li><li data-type='method'><a href="module-util.PsychObject.html#on">on</a></li><li data-type='method'><a href="module-util.PsychObject.html#once">once</a></li><li data-type='method'><a href="module-util.PsychObject.html#toString">toString</a></li></ul></li><li><a href="module-visual.VisualStim.html">VisualStim</a><ul class='methods'><li data-type='method'><a href="module-visual.VisualStim.html#_estimateBoundingBox">_estimateBoundingBox</a></li><li data-type='method'><a href="module-visual.VisualStim.html#_getBoundingBox_px">_getBoundingBox_px</a></li><li data-type='method'><a href="module-visual.VisualStim.html#_onChange">_onChange</a></li><li data-type='method'><a href="module-visual.VisualStim.html#_updateIfNeeded">_updateIfNeeded</a></li><li data-type='method'><a href="module-visual.VisualStim.html#contains">contains</a></li><li data-type='method'><a href="module-visual.VisualStim.html#draw">draw</a></li><li data-type='method'><a href="module-visual.VisualStim.html#hide">hide</a></li><li data-type='method'><a href="module-visual.VisualStim.html#refresh">refresh</a></li><li data-type='method'><a href="module-visual.VisualStim.html#release">release</a></li><li data-type='method'><a href="module-visual.VisualStim.html#setAutoDraw">setAutoDraw</a></li><li data-type='method'><a href="module-visual.VisualStim.html#setDepth">setDepth</a></li><li data-type='method'><a href="module-visual.VisualStim.html#setOri">setOri</a></li><li data-type='method'><a href="module-visual.VisualStim.html#setPos">setPos</a></li><li data-type='method'><a href="module-visual.VisualStim.html#setSize">setSize</a></li></ul></li><li><a href="MonotonicClock.html">MonotonicClock</a><ul class='methods'><li data-type='method'><a href="MonotonicClock.html#getLastResetTime">getLastResetTime</a></li><li data-type='method'><a href="MonotonicClock.html#getTime">getTime</a></li></ul></li><li><a href="Mouse.html">Mouse</a><ul class='methods'><li data-type='method'><a href="Mouse.html#clickReset">clickReset</a></li><li data-type='method'><a href="Mouse.html#getPos">getPos</a></li><li data-type='method'><a href="Mouse.html#getPressed">getPressed</a></li><li data-type='method'><a href="Mouse.html#getRel">getRel</a></li><li data-type='method'><a href="Mouse.html#getWheelRel">getWheelRel</a></li><li data-type='method'><a href="Mouse.html#isPressedIn">isPressedIn</a></li><li data-type='method'><a href="Mouse.html#mouseMoved">mouseMoved</a></li><li data-type='method'><a href="Mouse.html#mouseMoveTime">mouseMoveTime</a></li></ul></li><li><a 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href="MultiStairHandler.html#_prepareStaircases">_prepareStaircases</a></li><li data-type='method'><a href="MultiStairHandler.html#_validateConditions">_validateConditions</a></li><li data-type='method'><a href="MultiStairHandler.html#addResponse">addResponse</a></li></ul></li><li><a href="Polygon.html">Polygon</a><ul class='methods'><li data-type='method'><a href="Polygon.html#_estimateBoundingBox">_estimateBoundingBox</a></li><li data-type='method'><a href="Polygon.html#_getPixiPolygon">_getPixiPolygon</a></li><li data-type='method'><a href="Polygon.html#_getVertices_px">_getVertices_px</a></li><li data-type='method'><a href="Polygon.html#_updateIfNeeded">_updateIfNeeded</a></li><li data-type='method'><a href="Polygon.html#contains">contains</a></li><li data-type='method'><a href="Polygon.html#setEdges">setEdges</a></li><li data-type='method'><a href="Polygon.html#setRadius">setRadius</a></li><li data-type='method'><a 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class='methods'><li data-type='method'><a href="SpeechRecognition.html#_onChange">_onChange</a></li><li data-type='method'><a href="SpeechRecognition.html#_prepareRecognition">_prepareRecognition</a></li><li data-type='method'><a href="SpeechRecognition.html#clearTranscripts">clearTranscripts</a></li><li data-type='method'><a href="SpeechRecognition.html#getTranscripts">getTranscripts</a></li><li data-type='method'><a href="SpeechRecognition.html#start">start</a></li><li data-type='method'><a href="SpeechRecognition.html#stop">stop</a></li></ul></li><li><a href="TextBox.html">TextBox</a><ul class='methods'><li data-type='method'><a href="TextBox.html#_addEventListeners">_addEventListeners</a></li><li data-type='method'><a href="TextBox.html#_estimateBoundingBox">_estimateBoundingBox</a></li><li data-type='method'><a href="TextBox.html#_getAnchor">_getAnchor</a></li><li data-type='method'><a href="TextBox.html#_getDefaultLetterHeight">_getDefaultLetterHeight</a></li><li 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data-type='method'><a href="TrackPlayer.html#setDuration">setDuration</a></li><li data-type='method'><a href="TrackPlayer.html#setLoops">setLoops</a></li><li data-type='method'><a href="TrackPlayer.html#setVolume">setVolume</a></li><li data-type='method'><a href="TrackPlayer.html#stop">stop</a></li></ul></li><li><a href="Transcript.html">Transcript</a></li><li><a href="Window.html">Window</a><ul class='methods'><li data-type='method'><a href="Window.html#_fullRefresh">_fullRefresh</a></li><li data-type='method'><a href="Window.html#_refresh">_refresh</a></li><li data-type='method'><a href="Window.html#_setupPixi">_setupPixi</a></li><li data-type='method'><a href="Window.html#_updateIfNeeded">_updateIfNeeded</a></li><li data-type='method'><a href="Window.html#_writeLogOnFlip">_writeLogOnFlip</a></li><li data-type='method'><a href="Window.html#addPixiObject">addPixiObject</a></li><li data-type='method'><a href="Window.html#adjustScreenSize">adjustScreenSize</a></li><li 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<div id="main">
<h1 class="page-title">data/MultiStairHandler.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>/**
* Multiple Staircase Trial Handler
*
* @author Alain Pitiot
* @version 2021.2.3
* @copyright (c) 2017-2020 Ilixa Ltd. (http://ilixa.com) (c) 2020-2022 Open Science Tools Ltd.
* (https://opensciencetools.org)
* @license Distributed under the terms of the MIT License
*/
import {TrialHandler} from "./TrialHandler.js";
import {QuestHandler} from "./QuestHandler.js";
import * as util from "../util/Util.js";
import seedrandom from "seedrandom";
/**
* &lt;p>A handler dealing with multiple staircases, simultaneously.&lt;/p>
*
* &lt;p>Note that, at the moment, using the MultiStairHandler requires the jsQuest.js
* library to be loaded as a resource, at the start of the experiment.&lt;/p>
*
* @extends TrialHandler
*/
export class MultiStairHandler extends TrialHandler
{
/**
* @memberof module:data
* @param {Object} options - the handler options
* @param {module:core.PsychoJS} options.psychoJS - the PsychoJS instance
* @param {string} options.varName - the name of the variable / intensity / contrast
* / threshold manipulated by the staircases
* @param {MultiStairHandler.StaircaseType} [options.stairType="simple"] - the
* handler type
* @param {Array.&lt;Object> | String} [options.conditions= [undefined] ] - if it is a string,
* we treat it as the name of a conditions resource
* @param {module:data.TrialHandler.Method} options.method - the trial method
* @param {number} [options.nTrials=50] - maximum number of trials
* @param {number} options.randomSeed - seed for the random number generator
* @param {string} options.name - name of the handler
* @param {boolean} [options.autoLog= false] - whether or not to log
*/
constructor({
psychoJS,
varName,
stairType,
conditions,
method = TrialHandler.Method.RANDOM,
nTrials = 50,
randomSeed,
name,
autoLog
} = {})
{
super({
psychoJS,
name,
autoLog,
seed: randomSeed,
// note: multiStairHandler is a sequential TrialHandler, we deal with randomness
// in _nextTrial
method: TrialHandler.Method.SEQUENTIAL,
trialList: Array(nTrials),
nReps: 1
});
// now that we have initialised a sequential TrialHandler, we update method:
this._multiMethod = method;
this._addAttribute("varName", varName);
this._addAttribute("stairType", stairType, MultiStairHandler.StaircaseType.SIMPLE);
this._addAttribute("conditions", conditions, [undefined]);
this._addAttribute("nTrials", nTrials);
if (typeof randomSeed !== "undefined")
{
this._randomNumberGenerator = seedrandom(randomSeed);
}
else
{
this._randomNumberGenerator = seedrandom();
}
this._prepareStaircases();
this._nextTrial();
}
/**
* Get the current staircase.
*
* @returns {TrialHandler} the current staircase, or undefined if the trial has ended
*/
get currentStaircase()
{
return this._currentStaircase;
}
/**
* Get the current intensity.
*
* @returns {number} the intensity of the current staircase, or undefined if the trial has ended
*/
get intensity()
{
if (this._currentStaircase instanceof QuestHandler)
{
return this._currentStaircase.getQuestValue();
}
// TODO similar for simple staircase:
// if (this._currentStaircase instanceof StaircaseHandler)
// {
// return this._currentStaircase.getStairValue();
// }
return undefined;
}
/**
* Add a response to the current staircase.
*
* @param{number} response - the response to the trial, must be either 0 (incorrect or
* non-detected) or 1 (correct or detected)
* @param{number | undefined} [value] - optional intensity / contrast / threshold
*/
addResponse(response, value)
{
// check that response is either 0 or 1:
if (response !== 0 &amp;&amp; response !== 1)
{
throw {
origin: "MultiStairHandler.addResponse",
context: "when adding a trial response",
error: `the response must be either 0 or 1, got: ${JSON.stringify(response)}`
};
}
this._psychoJS.experiment.addData(this._name+'.response', response);
if (!this._finished)
{
// update the current staircase, but do not add the response again:
this._currentStaircase.addResponse(response, value, false);
// move onto the next trial:
this._nextTrial();
}
}
/**
* Validate the conditions.
*
* @protected
*/
_validateConditions()
{
try
{
// conditions must be a non empty array:
if (!Array.isArray(this._conditions) || this._conditions.length === 0)
{
throw "conditions should be a non empty array of objects";
}
// TODO this is temporary until we have implemented StairHandler:
if (this._stairType === MultiStairHandler.StaircaseType.SIMPLE)
{
throw "'simple' staircases are currently not supported";
}
for (const condition of this._conditions)
{
// each condition must be an object:
if (typeof condition !== "object")
{
throw "one of the conditions is not an object";
}
// each condition must include certain fields, such as startVal and label:
if (!("startVal" in condition))
{
throw "each condition should include a startVal field";
}
if (!("label" in condition))
{
throw "each condition should include a label field";
}
// for QUEST, we also need startValSd:
if (this._stairType === MultiStairHandler.StaircaseType.QUEST &amp;&amp; !("startValSd" in condition))
{
throw "QUEST conditions must include a startValSd field";
}
}
}
catch (error)
{
throw {
origin: "MultiStairHandler._validateConditions",
context: "when validating the conditions",
error
};
}
}
/**
* Setup the staircases, according to the conditions.
*
* @protected
*/
_prepareStaircases()
{
try
{
this._validateConditions();
this._staircases = [];
for (const condition of this._conditions)
{
let handler;
// QUEST handler:
if (this._stairType === MultiStairHandler.StaircaseType.QUEST)
{
const args = Object.assign({}, condition);
args.psychoJS = this._psychoJS;
args.varName = this._varName;
// label becomes name:
args.name = condition.label;
args.autoLog = this._autoLog;
if (typeof condition.nTrials === "undefined")
{
args.nTrials = this._nTrials;
}
handler = new QuestHandler(args);
}
// simple StairCase handler:
if (this._stairType === MultiStairHandler.StaircaseType.SIMPLE)
{
// TODO not supported just yet, an exception is raised in _validateConditions
continue;
}
this._staircases.push(handler);
}
this._currentPass = [];
this._currentStaircase = null;
}
catch (error)
{
throw {
origin: "MultiStairHandler._prepareStaircases",
context: "when preparing the staircases",
error
};
}
}
/**
* Move onto the next trial.
*
* @protected
*/
_nextTrial()
{
try
{
// if the current pass is empty, get a new one:
if (this._currentPass.length === 0)
{
this._currentPass = this._staircases.filter( handler => !handler.finished );
if (this._multiMethod === TrialHandler.Method.SEQUENTIAL)
{
// nothing to do
}
else if (this._multiMethod === TrialHandler.Method.RANDOM)
{
this._currentPass = util.shuffle(this._currentPass, this._randomNumberGenerator);
}
else if (this._multiMethod === TrialHandler.Method.FULL_RANDOM)
{
if (this._currentPass.length > 0)
{
// select a handler at random:
const index = Math.floor(this._randomNumberGenerator() * this._currentPass.length);
const handler = this._currentPass[index];
this._currentPass = [handler];
}
}
}
// pick the next staircase in the pass:
this._currentStaircase = this._currentPass.shift();
// test for termination:
if (typeof this._currentStaircase === "undefined")
{
this._finished = true;
// update the snapshots associated with the current trial in the trial list:
for (let t = 0; t &lt; this._snapshots.length - 1; ++t)
{
// the current trial is the last defined one:
if (typeof this._trialList[t + 1] === "undefined")
{
this._snapshots[t].finished = true;
break;
}
}
return;
}
// get the value, based on the type of the trial handler:
let value = Number.MIN_VALUE;
if (this._currentStaircase instanceof QuestHandler)
{
value = this._currentStaircase.getQuestValue();
}
// TODO add a test for simple staircase:
// if (this._currentStaircase instanceof StaircaseHandler)
// {
// value = this._currentStaircase.getStairValue();
// }
this._psychoJS.logger.debug(`selected staircase: ${this._currentStaircase.name}, estimated value for variable ${this._varName}: ${value}`);
// update the next undefined trial in the trial list, and the associated snapshot:
for (let t = 0; t &lt; this._trialList.length; ++t)
{
if (typeof this._trialList[t] === "undefined")
{
this._trialList[t] = {
[this._name+"."+this._varName]: value,
[this._name+".intensity"]: value
};
for (const attribute of this._currentStaircase._userAttributes)
{
// "name" becomes "label" again:
if (attribute === "name")
{
this._trialList[t][this._name+".label"] = this._currentStaircase["_name"];
}
else if (attribute !== "trialList" &amp;&amp; attribute !== "extraInfo")
{
this._trialList[t][this._name+"."+attribute] = this._currentStaircase["_" + attribute];
}
}
if (typeof this._snapshots[t] !== "undefined")
{
let fieldName = /*this._name + "." +*/ this._varName;
this._snapshots[t][fieldName] = value;
this._snapshots[t].trialAttributes.push(fieldName);
fieldName = /*this._name + ".*/ "intensity";
this._snapshots[t][fieldName] = value;
this._snapshots[t].trialAttributes.push(fieldName);
for (const attribute of this._currentStaircase._userAttributes)
{
// "name" becomes "label" again:
if (attribute === 'name')
{
fieldName = /*this._name + ".*/ "label";
this._snapshots[t][fieldName] = this._currentStaircase["_name"];
this._snapshots[t].trialAttributes.push(fieldName);
}
else if (attribute !== 'trialList' &amp;&amp; attribute !== 'extraInfo')
{
fieldName = /*this._name+"."+*/ attribute;
this._snapshots[t][fieldName] = this._currentStaircase["_" + attribute];
this._snapshots[t].trialAttributes.push(fieldName);
}
}
}
break;
}
}
}
catch (error)
{
throw {
origin: "MultiStairHandler._nextTrial",
context: "when moving onto the next trial",
error
};
}
}
}
/**
* MultiStairHandler staircase type.
*
* @enum {Symbol}
* @readonly
*/
MultiStairHandler.StaircaseType = {
/**
* Simple staircase handler.
*/
SIMPLE: Symbol.for("SIMPLE"),
/**
* QUEST handler.
*/
QUEST: Symbol.for("QUEST")
};
/**
* Staircase status.
*
* @enum {Symbol}
* @readonly
*/
MultiStairHandler.StaircaseStatus = {
/**
* The staircase is currently running.
*/
RUNNING: Symbol.for("RUNNING"),
/**
* The staircase is now finished.
*/
FINISHED: Symbol.for("FINISHED")
};
</code></pre>
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