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Fixed bugs when timing_response was > 0

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Related to Issue #62.

Also, explicitly canceled keyboard listener in cases where trial ended and participant didn't respond.
This commit is contained in:
Josh de Leeuw 2014-09-02 10:17:07 -04:00
parent 3e96600423
commit 03ce248d0b
1 changed files with 28 additions and 16 deletions
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44
plugins/jspsych-single-stim.js
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@ -47,9 +47,12 @@
// this evaluates the function and replaces // this evaluates the function and replaces
// it with the output of the function // it with the output of the function
trial = jsPsych.pluginAPI.normalizeTrialVariables(trial); trial = jsPsych.pluginAPI.normalizeTrialVariables(trial);
// this array holds handlers from setTimeout calls
// that need to be cleared if the trial ends early
var setTimeoutHandlers = [];
var trial_complete = false; // display stimulus
if (!trial.is_html) { if (!trial.is_html) {
display_element.append($('<img>', { display_element.append($('<img>', {
src: trial.a_path, src: trial.a_path,
@ -63,15 +66,23 @@
})); }));
} }
//show prompt here //show prompt if there is one
if (trial.prompt !== "") { if (trial.prompt !== "") {
display_element.append(trial.prompt); display_element.append(trial.prompt);
} }
// function to end trial when it is time
var end_trial = function(info) { var end_trial = function(info) {
// kill any remaining setTimeout handlers
for(var i = 0; i < setTimeoutHandlers.length; i++){
clearTimeout(setTimeoutHandlers[i]);
}
// kill keyboard listeners
jsPsych.pluginAPI.cancelKeyboardResponse(keyboardListener);
trial_complete = true; // gather the data to store for the trial
var trial_data = { var trial_data = {
"trial_type": "single-stim", "trial_type": "single-stim",
"trial_index": block.trial_idx, "trial_index": block.trial_idx,
@ -82,7 +93,10 @@
block.writeData($.extend({}, trial_data, trial.data)); block.writeData($.extend({}, trial_data, trial.data));
// clear the display
display_element.html(''); display_element.html('');
// move on to the next trial
if (trial.timing_post_trial > 0) { if (trial.timing_post_trial > 0) {
setTimeout(function() { setTimeout(function() {
block.next(); block.next();
@ -93,6 +107,7 @@
} }
}; };
// function to handle responses by the subject
var after_response = function(info) { var after_response = function(info) {
// after a valid response, the stimulus will have the CSS class 'responded' // after a valid response, the stimulus will have the CSS class 'responded'
@ -107,30 +122,27 @@
} }
}; };
// start the response listener
jsPsych.pluginAPI.getKeyboardResponse(after_response, trial.choices); var keyboardListener = jsPsych.pluginAPI.getKeyboardResponse(after_response, trial.choices);
// hide image if timing is set // hide image if timing is set
if (trial.timing_stim > 0) { if (trial.timing_stim > 0) {
setTimeout(function() { var t1 = setTimeout(function() {
if (!trial_complete) { $('#jspsych-single-stim-stimulus').css('visibility', 'hidden');
$('#jspsych-single-stim-stimulus').css('visibility', 'hidden');
}
}, trial.timing_stim); }, trial.timing_stim);
setTimeoutHandlers.push(t1);
} }
// end trial if time limit is set // end trial if time limit is set
if (trial.timing_response > 0) { if (trial.timing_response > 0) {
setTimeout(function() { var t2 = setTimeout(function() {
if (!trial_complete) { end_trial({rt: -1, key: -1});
end_trial({rt: -1, key: -1});
}
}, trial.timing_response); }, trial.timing_response);
setTimeoutHandlers.push(t2);
} }
}; };
return plugin; return plugin;
})(); })();
})(jQuery); })(jQuery);