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114 lines
3.1 KiB
JavaScript
114 lines
3.1 KiB
JavaScript
/**
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* jspsych-reconstruction
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* a jspsych plugin for a reconstruction task where the subject recreates
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* a stimulus from memory
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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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(function($) {
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jsPsych['reconstruction'] = (function() {
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var plugin = {};
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plugin.create = function(params) {
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params = jsPsych.pluginAPI.enforceArray(params, ['data']);
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var n_trials = (typeof params.starting_value == 'undefined') ? 1 : params.starting_value.length
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var trials = [];
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for (var i = 0; i < n_trials; i++) {
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trials.push({
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starting_value: (typeof params.starting_value == 'undefined') ? [0.5] : params.starting_value[i],
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stim_function: params.stim_function,
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step_size: params.step_size || 0.05,
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key_increase: params.key_increase || 'h',
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key_decrease: params.key_decrease || 'g'
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});
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}
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return trials;
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};
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plugin.trial = function(display_element, trial) {
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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.normalizeTrialVariables(trial, ['stim_function']);
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// current param level
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var param = trial.starting_value;
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// set-up key listeners
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var after_response = function(info){
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// get new param value
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if(info.key == key_increase) {
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param = param + step_size;
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} else if(info.key == key_decrease) {
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param = param - step_size;
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}
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param = Math.max(Math.min(1,param),0);
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// refresh the display
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draw(param);
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}
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// listen for responses
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var key_listener = jsPsych.pluginAPI.getKeyboardResponse(after_response, [trial.key_increase, trial.key_decrease], 'date', true);
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// draw first iteration
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draw(param);
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function draw(param){
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display_element.html('');
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display_element.append($('<div id="jspsych-reconstruction-stim-container"></div>'));
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$('#jspsych-reconstruction-stim-container').html(trial.stim_function(param));
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// add submit button
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display_element.append($('<button>', {
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'id': 'jspsych-survey-text-next',
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'class': 'jspsych-survey-text'
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}));
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$("#jspsych-survey-text-next").html('Submit Answers');
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$("#jspsych-survey-text-next").click(
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}
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function endTrial(){
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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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jsPsych.data.write($.extend({}, {
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"rt": response_time,
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"final_value": param,
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"start_value": trial.starting_value
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}, trial.data));
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display_element.html('');
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// next trial
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if (trial.timing_post_trial > 0) {
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setTimeout(function() {
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jsPsych.finishTrial();
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}, trial.timing_post_trial);
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} else {
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jsPsych.finishTrial();
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}
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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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})(jQuery);
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