Isn't there any jsPsych.pluginAPI.compare"Buttons" ?

[mary-9555]

Hi again
I need feedback for the "jspsych-image-button-response" plugin.
As my choices are not "value", I got these errors:

1. You must specify a value for the choices parameter in the image-button-response plugin.
   setDefaultValues @ jspsych.js:1144
   jspsych-image-button-response.js:166

2. Uncaught TypeError: Cannot read property 'length' of undefined
   at Object.jsPsych.plugins.image-button-response.plugin.trial (jspsych-image-button-response.js:166)
   at doTrial (jspsych.js:1019)
   at nextTrial (jspsych.js:967)
   at Object.window.jsPsych.core.finishTrial (jspsych.js:339)
   at end_trial (jspsych-image-button-response.js:306)
   at after_response (jspsych-image-button-response.js:285)
   at HTMLDivElement. (jspsych-image-button-response.js:254)
   p%3E:1

3. Failed to load resource: net::ERR_FILE_NOT_FOUND

any advice?

[jodeleeuw]

Hi @mary-9555,

It would help a lot if you shared the code that generated these errors. It sounds like you may not have a choices parameter specified in one of your image-button-response trials.

[mary-9555]

Sure!
Here it is:

var image_trial = {
type: 'image-button-response',
stimulus: 'img/b/004_o_m_s_b.jpeg',
choices: ['sad', 'frightened', 'neutral','angry','disgusting','happy'],
data: {
stimulus_type: 'image'
},
on_finish: function(data){
if(jsPsych.pluginAPI.compareKeys(data.response, "sad")){
data.correct = true;
} else {
data.correct = false;
}
}
}

var feedback = {
type: 'instructions',
stimulus: function(){
var last_trial_correct = jsPsych.data.get().last(1).values()[0].correct;
if(last_trial_correct){
return "

Correct!

";
} else {
return "

Wrong!... The correct answer was 'sad'.

";
show_clickable_nav; true,
button_label_previous; 'previous',
button_label_next; 'next'
}
}
}

timeline.push(image_trial, feedback);