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  • Randomise

    Hi, I have two stimulus lists. A list of same faces and a list of different faces. I wanted them to be completely random, for example same same different same different different different same etc

    Instead they alternate in a pattern like this same different same different same different.

    I have tried absaloutly everything, I've made sure randomisation is ticked, I've tried the box underneath it, I have tried sooo many combinations of things and nothing is working. Please please help me I have no idea what's wrong please I am really desperate.

  • #2
    Create two trials - one per stimulus list - and randomize at the block level. The key is to also select randomize stimulus list items across trials.

    I've attached an experiment that applies this feature.
    Attached Files


    • #3
      Hi, I have tried two trials, one per stimulus list, and I have also tried randomising stimulus list items across trials, I have tried every possible thing. Nothing is working. I am so desperate, please help me.


      • #4
        Interesting. Can you attach an experiment file of one of your attempts? I will try to modify it accordingly and better understand your situation.


        • #5
          two tasks

          Hi, I wanted two tasks but I wanted to have them in just one experiment. So task A has two stimulus lists and task B has two stimulus lists as well, but they are 2 completely different tasks, but I just want them to be in one experiment so participants can first complete task A, and then do task B.

          As I have two stimulus lists for each task, will I be able to randomise them but randomise only the two stimulus lists and not randomise all 4 stimulus lists together, as they are 2 separate tasks.

          I know this is slightly confusing, I've tried to summarise it below

          task A - 2 stimulus lists - want the pictures to be randomised
          task B - 2 stimulus lists - want the pictures to be randomised.

          however I do not want the 4 stimulus lists to be randomised together as the tasks are separate, they just will be in one experiment.

          Thank you so much


          • #6
            This can be done by implementing two different blocks, one per task. They should both contain their own two trials and stimulus lists. I have attached an experiment that demonstrates this. One block randomizes letters and numbers together; the other randomizes words and non-words together.

            Please take a look at the experiment and let me know if you have any more questions.
            Attached Files