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96 lines
3.0 KiB
HTML
96 lines
3.0 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>jspsych-same-different plugin example</title>
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<!-- jQuery -->
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<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
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<!-- jsPsych -->
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<script src="scripts/jspsych.js"></script>
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<script src="scripts/plugins/jspsych-same-different.js"></script>
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<!-- style -->
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<style>
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#jspsych_target {
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margin: 50px auto 50px auto;
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width: 800px;
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font-size:18px;
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text-align: center;
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}
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#instructions {
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text-align: left;
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}
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pre {
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text-align: left;
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}
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img {
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width: 300px;
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}
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</style>
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</head>
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<body>
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<div id="jspsych_target"></div>
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</body>
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<script type="text/javascript">
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// how many trials?
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var n_trials = 6;
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// declare an array to hold the stimuli
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var stimuli = [];
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for (var i = 1; i <= 12; i++) {
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stimuli.push("img/cell_img_" + i + ".jpg");
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}
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var pairs = [];
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var answers = [];
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for(var i = 0; i < n_trials; i++){
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// randomly choose the first stim we will show to subject
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var first_stim = stimuli[Math.floor(Math.random()*stimuli.length)];
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// randomly choose whether this trial will be "same" or "different"
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if(Math.floor(Math.random()*2)===0){
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// same trial
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// add the matching pair to the pairs list
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pairs.push([first_stim, first_stim]);
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// add the answer to the answers list
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answers.push("same");
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} else {
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// different trial
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// need a second stim that is not the same as the first
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var second_stim = stimuli[Math.floor(Math.random()*stimuli.length)];
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while(second_stim==first_stim){
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second_stim = stimuli[Math.floor(Math.random()*stimuli.length)];
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}
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// add the pair
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pairs.push([first_stim, second_stim]);
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// add the answer
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answers.push("different");
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}
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}
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// create free-sort block for jspsych
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var same_diff_block = {
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type: 'same-different',
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stimuli: pairs,
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answer: answers,
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prompt: "<p>Press Q if the images were the same. Press P if they were different.</p>"
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};
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// launch jspsych experiment
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jsPsych.init({
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display_element: $('#jspsych_target'),
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experiment_structure: [same_diff_block],
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on_finish: function(data) {
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$('#jspsych_target').append($("<pre>", {
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html: JSON.stringify(data, undefined, 2)
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}));
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}
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});
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</script>
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</html> |