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Help with converting inline python to java

Hi everyone,

I found an AX-CPT programmed in python but I want to rubn it in OSWEB.

There is a small amount of code in python. Essentially, the experiement presents has a pool of letters (distractors) which are randomly allocated to randomised items that are presented in the experiment (i.e. 'letter1' , 'letter2', 'letter3', 'letter4' and 'dist1' dist2' and 'dist3'.

The first inline script shuffles the pool of letters

The the seond inline script alocates the shuffled list to the letters and destractors used in the experiemnt

At the end of the trial sequence, the list is reshuffled and letters and distractors are reassigned.

Could anyone help convert to JAVA?

Many Thanks



  • Hi @Skilli ,

    I think something like the following should work:

    In an inline_javascript item at the beginning of your experiment, define a shuffle function:

    // Create a shuffle function:
    // See e.g.
    function Shuffle(a) {
        // a --- an array
    	for(var j, x, i = a.length; i; j = 
        parseInt(Math.random() * i), x = a[--i], a[i] = a[j], a[j] = x);
        // return shuffled arrray
        return a;

    At the beginning of your trial sequence, append another inline_javascript item to shuffle the list and define the distractors:

    // Define the list as a JavaScript Array:
    // Unshuffled:
    var distractor_list = ["B", "C", "D", "E", "F", "G"]
    // Shuffled:
    var distractor_list = Shuffle(distractor_list)
    // Pop the last n items (here, 3) from the list and store
    // them in the vars object (so that they can be used in
    // the GUI (e.g. a sketchpad) via the square-bracket syntax:
    vars.distractor1 = distractor_list.pop()
    vars.distractor2 = distractor_list.pop()
    vars.distractor3 = distractor_list.pop()

    See the attached script for an example.

    Hope this helps!



    Did you like my answer? Feel free to Buy Me A Coffee :)

  • Hi @lvanderlinden .,

    I have added the code ot my study and it works. However, I get an error when runnign it in the web browser.

    ReferenceError: Shuffle is not defined


  • Hi Deiniol,

    I think javascript_inlines' workspace is not global. That means that whatever you do in one inline_script item will only be defined in that item. You would have to define the Shuffle function in every inline_script item that you are using. See here (4. bullet point):

    Does that solve your problem?

    Side question, is there a reason you are not using the "standard" version of the AX-CPT with only A, X, B, Y? With that implementation your live would probably be much easier.


    Buy Me A Coffee

  • @eduard

    Thanks works brilliantly. I only have one inline script so that works great.

    Most of the AXCPT experiements that I have read about use letters A and X but then randomly allocate letters to B and Y. Some have a pool of items for context B and a seperate pool of items for target Y.

    I have made previous versions in e-prime using nested lists.

    many thanks


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