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added options to si-kr plugin

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can now opt to leave the stimulus on the screen for a fixed length of
time, still recording the responses when they occur.

also allows a timelimit to be set on the responses, so that if no
responses is recorded after some period of time, the trial completes and
records a -1 as the response.
This commit is contained in:
Josh de Leeuw 2013-01-18 14:24:09 -05:00
parent a08dbc7029
commit 42d78b3510
1 changed files with 48 additions and 14 deletions
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60
plugins/jspsych-singleimage-keyresponse.js
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@ -18,8 +18,11 @@
trials[i]["type"] = "singleimage_keyresponse";
trials[i]["a_path"] = stims[i];
trials[i]["choices"] = params["choices"];
// option to show image for fixed time interval, ignoring key responses
trials[i]["continue_afer_response"] = params["continue_after_response"] || true;
// timing parameters
trials[i]["timing_stim"] = params["timing_stim"]; // if undefined, then show indefinitely
trials[i]["timing_stim"] = params["timing_stim"] || -1; // if -1, then show indefinitely
trials[i]["timing_response"] = params["timing_response"] || -1; // if -1, then wait for response forever
trials[i]["timing_post_trial"] = params["timing_post_trial"] || 1000;
// optional parameters
if(params["prompt"] != undefined){
@ -33,25 +36,34 @@
}
var sikr_trial_complete = false;
plugin.trial = function($this, block, trial, part)
plugin.trial = function(display_element, block, trial, part)
{
switch(part){
case 1:
key_press = -1;
sikr_trial_complete = false;
startTime = (new Date()).getTime();
$this.append($('<img>', {
display_element.append($('<img>', {
"src": trial.a_path,
"id": 'sikr_img'
}));
//show prompt here
if(trial.prompt != undefined){
$this.append(trial.prompt);
display_element.append(trial.prompt);
}
var cont_function = function(){
endTime = (new Date()).getTime();
rt = (endTime-startTime);
sikr_trial_complete = true;
plugin.trial(display_element, block, trial, part+1);
}
// hide image if timing is set
if(trial.timing_stim != undefined){
if(trial.timing_stim > 0){
setTimeout(function(){
if(!sikr_trial_complete){
$('#sikr_img').css('visibility','hidden');
@ -71,18 +83,40 @@
}
if(flag)
{
endTime = (new Date()).getTime();
rt = (endTime-startTime);
key_press = e.which;
var trial_data = {"rt": rt, "a_path": trial.a_path, "key_press": e.which}
// after a valid response, the image will have the CSS class 'responded'
// which can be used to provide visual feedback that a response was recorded
$("#sikr_img").addClass('responded');
if(trial.continue_after_response){
// response triggers the next trial in this case.
// if hide_image_after_response is true, then next
// trial should be triggered by timeout function below.
cont_function();
}
}
}
$(document).keyup(resp_func);
// end trial if time limit is set
if(trial.timing_response > 0)
{
setTimeout(function(){
if(!sikr_trial_complete){
cont_function();
}
}, trial.timing_response);
}
break;
case 2:
var trial_data = {"trial_type": "singleimage_keyresponse", "rt": rt, "a_path": trial.a_path, "key_press": key_press}
block.data[block.trial_idx] = $.extend({},trial_data,trial.data);
$(document).unbind('keyup',resp_func);
$this.html('');
sikr_trial_complete = true;
display_element.html('');
setTimeout(function(){block.next();}, trial.timing_post_trial);
}
}
$(document).keyup(resp_func);
break;
}
}