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82 lines
2.7 KiB
JavaScript
82 lines
2.7 KiB
JavaScript
/**
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* jspsych-slider-response
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* a jspsych plugin for free response survey questions
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*
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* Josh de Leeuw
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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['slider-response'] = (function() {
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var plugin = {};
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jsPsych.pluginAPI.registerPreload('slider-response', 'stimulus', 'image', function(t){ return !t.is_html || t.is_html == 'undefined'});
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plugin.info = {
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name: 'slider-response',
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description: '',
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parameters: {
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}
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}
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plugin.trial = function(display_element, trial) {
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trial.min = trial.min || 0;
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trial.max = trial.max || 100;
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trial.step = trial.step || 1;
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trial.is_html = typeof trial.is_html === 'undefined' ? false : trial.is_html;
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trial.button_label = typeof trial.button_label === 'undefined' ? 'Next' : trial.button_label;
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// if any trial variables are functions
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// this evaluates the function and replaces
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// it with the output of the function
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trial = jsPsych.pluginAPI.evaluateFunctionParameters(trial);
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var html = '<div id="jspsych-slider-response" class="jspsych-slider-response-question" style="margin: 100px 0px;">';
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html += '<div class="jspsych-slider-response-question-text">' + trial.stimulus + '</div>';
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html += '<div class="jspsych-slider-response-container" style="position:relative;">';
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html += '<input type="range" min="'+trial.min+'" max="'+trial.max+'" step="'+trial.step+'" style="width: 100%;" id="jspsych-slider-response-response"></input>';
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html += '<div>'
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for(var j=0; j < trial.labels.length; j++){
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var width = 100/(trial.labels.length-1);
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var left_offset = (j * (100 /(trial.labels.length - 1))) - (width/2);
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html += '<div style="display: inline-block; position: absolute; left:'+left_offset+'%; text-align: center; width: '+width+'%;">';
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html += '<span style="text-align: center; font-size: 80%;">'+trial.labels[j]+'</span>';
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html += '</div>'
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}
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html += '</div>';
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html += '</div>';
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html += '</div>';
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// add submit button
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html += '<button id="jspsych-slider-response-next" class="jspsych-btn">'+trial.button_label+'</button>';
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display_element.innerHTML = html;
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display_element.querySelector('#jspsych-slider-response-next').addEventListener('click', function() {
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// measure response time
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var endTime = (new Date()).getTime();
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var response_time = endTime - startTime;
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// save data
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var trialdata = {
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"rt": response_time,
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"response": display_element.querySelector('#jspsych-slider-response-response').value
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};
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display_element.innerHTML = '';
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// next trial
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jsPsych.finishTrial(trialdata);
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});
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var startTime = (new Date()).getTime();
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};
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return plugin;
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})();
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