Trouble with loop node

[cratlagh]

Hi folks,

I'm trying to get this loop node to work as intended:

var trialLOOP = {
                type: 'html-keyboard-response',
                stimulus: 'Hello. This is in a loop. Press "r" to repeat this trial, or "c" to continue.',
                choices: ['r','c']
};

var loop_node = {

                timeline: [trialLOOP],

                loop_function: function(data){
                    var key_response = data.values()[0].response;
                    if(jsPsych.pluginAPI.compareKeys(key_response,'r')){
                    return true;
                    } else {
                    return false;
                    }
                }
};

timeline_list.push(loop_node)

but I keep getting this error:

jspsych.js:2422 

Error in jsPsych.pluginAPI.compareKeys: arguments must be numeric key codes, key strings, or null.

It looks like the response isn't being captured?

I've used console.log to have a look at it returns 'undefined'.

I'm clearly missing something painfully obvious but I can't see the woods for the trees at the moment.

Any help would be much appreciated.

Cheers.

[cratlagh]

Think I figured out what I was doing wrong.

If I replace data.values()[0].response; with data.values()[0].key_press; it seems to work.

Cheers!