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89 lines
3.0 KiB
JavaScript
89 lines
3.0 KiB
JavaScript
/* jspsych-text.js
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* Josh de Leeuw
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*
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* This plugin displays text (including HTML formatted strings) during the experiment.
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* Use it to show instructions, provide performance feedback, etc...
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*
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*
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*/
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(function($) {
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jsPsych.text = (function() {
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var plugin = {};
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plugin.create = function(params) {
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params = jsPsych.enforceArray(params, ['text','data']);
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var trials = new Array(params.text.length);
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for (var i = 0; i < trials.length; i++) {
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trials[i] = {};
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trials[i].type = "text"; // must match plugin name
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trials[i].text = params.text[i]; // text of all trials
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trials[i].cont_key = params.cont_key || []; // keycode to press to advance screen, default is all keys.
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trials[i].timing_post_trial = (typeof params.timing_post_trial === 'undefined') ? 0 : params.timing_post_trial;
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trials[i].data = (typeof params.data === 'undefined') ? {} : params.data[i];
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}
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return trials;
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};
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plugin.trial = function(display_element, block, trial, part) {
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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.normalizeTrialVariables(trial);
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// set the HTML of the display target to replaced_text.
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display_element.html(trial.text);
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var after_response = function(info) {
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display_element.html(''); // clear the display
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save_data(info.key, info.rt);
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if (trial.timing_post_trial > 0) {
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setTimeout(function() {
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block.next();
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}, trial.timing_post_trial);
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}
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else {
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block.next();
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} // call block.next() to advance the experiment after a delay.
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};
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var mouse_listener = function(e) {
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var rt = (new Date()).getTime() - start_time;
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display_element.unbind('click', mouse_listener);
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after_response({key: 'mouse', rt: rt});
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};
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// check if key is 'mouse'
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if (trial.cont_key == 'mouse') {
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display_element.click(mouse_listener);
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var start_time = (new Date()).getTime();
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} else {
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jsPsych.getKeyboardResponse(after_response, trial.cont_key);
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}
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function save_data(key, rt) {
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block.writeData($.extend({}, {
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"trial_type": "text",
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"trial_index": block.trial_idx,
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"rt": rt,
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"key_press": key
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}, trial.data));
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}
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};
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return plugin;
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})();
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})(jQuery);
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