help with jspsych and JATOS

Runyu · June 25

Hi!

I'm recently working on buliding an online perception experiment by using jspsych. However, when I try to put the last lines of javascript:

var jsPsych = initJsPsych({
 show_progress_bar: true,
 on_finish: function() {
  var resultJson = jsPsych.data.get().json();
  jatos.endStudy(resultJson, true);
 }
});

The end page is totally blank, and the JATOS results webpage still shows "not finished yet" in each response...

And if I use the line:

jatos.onLoad(function() {
 var jsPsych = initJsPsych({
  timeline: timeline,
  show_progress_bar: false,
  on_finish: function() {
   var resultJson = jsPsych.data.get().json();
   jatos.endStudy(resultJson, "success");   
  }
 });

Then the whole experiment is blank!

In the beginning, I do put the line "<script src="jatos.js"></script>"..Im suspecting that maybe because I use jspsych 8.2.1 not 7 (because the instructions given on JATOS use jspsych 7 //https://www.jatos.org/jsPsych-and-JATOS.html)?

Im totally a beginner of programming, sorry for my questions sound basic..

Thank you for your help and time!

kri · June 26

Hi!

I took the liberty to format your code examples and I encourage everyone to do the same - it makes it much more readable.

I'm just looking into jsPsych 8 and there seem to be no difference in how to use it together with JATOS.

You need three parts (just like written in https://www.jatos.org/jsPsych-and-JATOS.html):

1) Include the jatos.js library in the <head> section of your HTML file:

<script src="jatos.js"></script>

2) in initJsPsych the on_finish has to point at jatos.endStudy or a similar function like jatos.startNextComponent:. As far as I understand jsPsych the timeline does not go here.

var jsPsych = initJsPsych({
  show_progress_bar: true,
  on_finish: () => jatos.endStudy(jsPsych.data.get().json())
});

3) Wrap jsPsych.run with jatos.onLoad and here goes your jsPsych timeline :

jatos.onLoad(() => {
  jsPsych.run(timeline);
});

This should do it.

Best,

K.

Runyu · June 30

Dear Kri,

I paste the code you give me, then the whole experiment (from the very first page becomes blank..), its relly weird...

kri · July 1

Do you get any errors in the browser's console? And can you please post your code here?

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