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Andreas Wilms
247
PCSurvey/PCstatic/js/plugins/jspsych-serial-reaction-time.js
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247
PCSurvey/PCstatic/js/plugins/jspsych-serial-reaction-time.js
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/**
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* jspsych-serial-reaction-time
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* Josh de Leeuw
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*
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* plugin for running a serial reaction time task
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*
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* documentation: docs.jspsych.org
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*
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**/
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jsPsych.plugins["serial-reaction-time"] = (function() {
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var plugin = {};
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plugin.info = {
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name: 'serial-reaction-time',
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description: '',
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parameters: {
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grid: {
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type: jsPsych.plugins.parameterType.BOOL,
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pretty_name: 'Grid',
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array: true,
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default: [[1,1,1,1]],
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description: 'This array represents the grid of boxes shown on the screen.'
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},
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target: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Target',
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array: true,
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default: undefined,
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description: 'The location of the target. The array should be the [row, column] of the target.'
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},
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choices: {
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type: jsPsych.plugins.parameterType.KEYCODE,
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pretty_name: 'Choices',
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array: true,
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default: [['3','5','7','9']],
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description: ' Each entry in this array is the key that should be pressed for that corresponding location in the grid.'
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},
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grid_square_size: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Grid square size',
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default: 100,
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description: 'The width and height in pixels of each square in the grid.'
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},
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target_color: {
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type: jsPsych.plugins.parameterType.STRING,
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pretty_name: 'Target color',
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default: "#999",
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description: 'The color of the target square.'
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},
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response_ends_trial: {
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type: jsPsych.plugins.parameterType.BOOL,
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pretty_name: 'Response ends trial',
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default: true,
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description: 'If true, trial ends when user makes a response.'
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},
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pre_target_duration: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Pre-target duration',
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default: 0,
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description: 'The number of milliseconds to display the grid before the target changes color.'
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},
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trial_duration: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Trial duration',
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default: null,
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description: 'How long to show the trial.'
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},
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show_response_feedback: {
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type: jsPsych.plugins.parameterType.BOOL,
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pretty_name: 'Show response feedback',
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default: false,
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description: 'If true, show feedback indicating where the user responded and whether it was correct.'
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},
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feedback_duration: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Feedback duration',
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default: 200,
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description: 'The length of time in milliseconds to show the feedback.'
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},
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fade_duration: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Fade duration',
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default: null,
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description: 'If a positive number, the target will progressively change color at the start of the trial, with the transition lasting this many milliseconds.'
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},
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prompt: {
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type: jsPsych.plugins.parameterType.STRING,
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pretty_name: 'Prompt',
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default: null,
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no_function: false,
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description: ' Any content here will be displayed below the stimulus.'
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},
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}
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}
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plugin.trial = function(display_element, trial) {
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// create a flattened version of the choices array
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var flat_choices = jsPsych.utils.flatten(trial.choices);
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while(flat_choices.indexOf('') > -1){
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flat_choices.splice(flat_choices.indexOf(''),1);
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}
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// display stimulus
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var stimulus = this.stimulus(trial.grid, trial.grid_square_size);
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display_element.innerHTML = stimulus;
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if(trial.pre_target_duration <= 0){
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showTarget();
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} else {
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jsPsych.pluginAPI.setTimeout(function(){
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showTarget();
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}, trial.pre_target_duration);
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}
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//show prompt if there is one
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if (trial.prompt !== null) {
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display_element.innerHTML += trial.prompt;
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}
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var keyboardListener = {};
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var response = {
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rt: null,
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key: false,
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correct: false
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}
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function showTarget(){
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if(trial.fade_duration == null){
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display_element.querySelector('#jspsych-serial-reaction-time-stimulus-cell-'+trial.target[0]+'-'+trial.target[1]).style.backgroundColor = trial.target_color;
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} else {
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display_element.querySelector('#jspsych-serial-reaction-time-stimulus-cell-'+trial.target[0]+'-'+trial.target[1]).style.transition = "background-color "+trial.fade_duration;
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display_element.querySelector('#jspsych-serial-reaction-time-stimulus-cell-'+trial.target[0]+'-'+trial.target[1]).style.backgroundColor = trial.target_color;
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}
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keyboardListener = jsPsych.pluginAPI.getKeyboardResponse({
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callback_function: after_response,
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valid_responses: flat_choices,
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allow_held_key: false
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});
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if(trial.trial_duration > null){
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jsPsych.pluginAPI.setTimeout(showFeedback, trial.trial_duration);
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}
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}
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function showFeedback() {
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if(response.rt == null || trial.show_response_feedback == false){
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endTrial();
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} else {
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var color = response.correct ? '#0f0' : '#f00';
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display_element.querySelector('#jspsych-serial-reaction-time-stimulus-cell-'+response.responseLoc[0]+'-'+response.responseLoc[1]).style.transition = "";
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display_element.querySelector('#jspsych-serial-reaction-time-stimulus-cell-'+response.responseLoc[0]+'-'+response.responseLoc[1]).style.backgroundColor = color;
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jsPsych.pluginAPI.setTimeout(endTrial, trial.feedback_duration);
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}
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}
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function endTrial() {
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// kill any remaining setTimeout handlers
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jsPsych.pluginAPI.clearAllTimeouts();
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// kill keyboard listeners
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if (typeof keyboardListener !== 'undefined') {
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jsPsych.pluginAPI.cancelKeyboardResponse(keyboardListener);
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}
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// gather the data to store for the trial
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var trial_data = {
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"rt": response.rt,
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"key_press": response.key,
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"correct": response.correct,
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"grid": JSON.stringify(trial.grid),
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"target": JSON.stringify(trial.target)
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};
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// clear the display
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display_element.innerHTML = '';
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// move on to the next trial
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jsPsych.finishTrial(trial_data);
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};
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// function to handle responses by the subject
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function after_response(info) {
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// only record first response
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response = response.rt == null ? info : response;
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// check if the response is correct
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var responseLoc = [];
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for(var i=0; i<trial.choices.length; i++){
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for(var j=0; j<trial.choices[i].length; j++){
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var t = typeof trial.choices[i][j] == 'string' ? jsPsych.pluginAPI.convertKeyCharacterToKeyCode(trial.choices[i][j]) : trial.choices[i][j];
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if(info.key == t){
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responseLoc = [i,j];
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break;
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}
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}
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}
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response.responseLoc = responseLoc;
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response.correct = (JSON.stringify(responseLoc) == JSON.stringify(trial.target));
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if (trial.response_ends_trial) {
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if (trial.show_response_feedback){
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showFeedback(response.correct);
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} else {
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endTrial();
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}
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}
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};
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};
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plugin.stimulus = function(grid, square_size, target, target_color, labels) {
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var stimulus = "<div id='jspsych-serial-reaction-time-stimulus' style='margin:auto; display: table; table-layout: fixed; border-spacing:"+square_size/4+"px'>";
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for(var i=0; i<grid.length; i++){
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stimulus += "<div class='jspsych-serial-reaction-time-stimulus-row' style='display:table-row;'>";
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for(var j=0; j<grid[i].length; j++){
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stimulus += "<div class='jspsych-serial-reaction-time-stimulus-cell' id='jspsych-serial-reaction-time-stimulus-cell-"+i+"-"+j+"' "+
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"style='width:"+square_size+"px; height:"+square_size+"px; display:table-cell; vertical-align:middle; text-align: center; font-size:"+square_size/2+"px;";
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if(grid[i][j] == 1){
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stimulus += "border: 2px solid black;"
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}
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if(typeof target !== 'undefined' && target[0] == i && target[1] == j){
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stimulus += "background-color: "+target_color+";"
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}
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stimulus += "'>";
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if(typeof labels !=='undefined' && labels[i][j] !== false){
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stimulus += labels[i][j]
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}
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stimulus += "</div>";
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}
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stimulus += "</div>";
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}
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stimulus += "</div>";
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return stimulus
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}
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return plugin;
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})();
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