Uncaught TypeError: jsPsych.data.get is not a function

[ThibaultC123]

Hello,

I have to modify an existing jsPsych experiment to summarize reaction times over conditions.

Wherever I insert any of these lines (close to that in the manual):

var myData = jsPsych.data.get().filter({trial_type: 'poldrack-single-stim'}).filterCustom(function(x){return x.trial_num > 0});

var myData = jsPsych.data.get()

I get the following message again and again in my console: "Uncaught TypeError: jsPsych.data.get is not a function"

Any help would be greatly appreciated. Thanks in advance.

[becky-gilbert]

Hi @ThibaultC123, that's odd... jsPsych.data.get() should definitely be a function, at least in newer jsPsych releases (after 6.0). Do you know what version of the jspsych.js file you're using? If you're not sure, one thing you could try is searching for module.get in your jspsych.js file - with jsPsych v6.0 and higher, you should find this:

 module.get = function() {
    return allData;
  };

Also, do you see any errors in the console that occur before the "Uncaught TypeError: jsPsych.data.get is not a function" error?

[becky-gilbert]

This might be due to the switch from using key codes to key characters (i.e. the keyboard event's key property - explained in the v6.3.0 release notes). So if any of the key choice parameters in your code use numbers, then you'll want to change these to characters. E.g., choices: [70,74] should now be choices: ['f','j'], and choices: ['space'] / choices: [32] should now be choices: [' ']. This is true for all key choice parameters, including e.g. key_forward and key_backward in the instructions plugin.

[ThibaultC123]

You were right once more!

This is the last problem I bumped in after clearing a couple of others...

var post_trial_gap = function() {
	var curr_trial = jsPsych.progress().current_trial_global
       return 3500 - jsPsych.data.getData()[curr_trial - 1].rt - jsPsych.data.getData()[curr_trial - 4].block_duration
}

The aim is to compute the post_trial_gap as a function of the random duration of a fixation (i.e. trial-4) and the reaction time (i.e. trial-1). Since jsPsych.data.getData() doesn't exist any more in v6.3.0, Do you have any idea ?

[ThibaultC123]

I got it! Here is the updated code

var post_trial_gap = function() {	// Modified by Thibault for JsPsych 6.3.0
	var rt = jsPsych.data.getLastTrialData().select('rt').values[0]
	var D1 = jsPsych.data.get().last(4).select('block_duration').values[0]
	return 3500 - D1 - rt
}

[becky-gilbert]

Awesome, glad you figured it out!

[ThibaultC123]

Thankl you. Still have some pending issues with Timeout when presenting the stimulus... Also have to work on the output of results. Will let you know soon if I'm stuck. :)