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107 lines
2.9 KiB
JavaScript
107 lines
2.9 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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jsPsych['reconstruction'] = (function() {
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var plugin = {};
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plugin.trial = function(display_element, trial) {
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// default parameter values
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trial.starting_value = (typeof trial.starting_value == 'undefined') ? 0.5 : trial.starting_value[i];
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trial.step_size = trial.step_size || 0.05;
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trial.key_increase = trial.key_increase || 'h';
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trial.key_decrease = trial.key_decrease || 'g';
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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, ['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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//console.log('fire');
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var key_i = (typeof trial.key_increase == 'string') ? jsPsych.pluginAPI.convertKeyCharacterToKeyCode(trial.key_increase) : trial.key_increase;
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var key_d = (typeof trial.key_decrease == 'string') ? jsPsych.pluginAPI.convertKeyCharacterToKeyCode(trial.key_decrease) : trial.key_decrease;
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// get new param value
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if (info.key == key_i) {
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param = param + trial.step_size;
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} else if (info.key == key_d) {
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param = param - trial.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({
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callback_function: after_response,
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valid_responses: [trial.key_increase, trial.key_decrease],
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rt_method: 'date',
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persist: true,
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allow_held_key: true
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});
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// draw first iteration
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draw(param);
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function draw(param) {
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//console.log(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(endTrial);
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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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var trial_data = {
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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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};
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display_element.html('');
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// next trial
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jsPsych.finishTrial(trial_data);
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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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