[solved] Random item solution

stafanouser

Hi i am little imbarassed to do this question but probably i miss something that i can’t understand. I have read the tutorial and other topics about random item but I don’t find any solution. In my experiment I have only to "show" 50 "stimulus" that I have created with the sketch pad in the " random order". I created the loop and the sequence in which I have included the 50 items. I have clicked on " random" inside the dialogue loop window but the items come out in sequence and not in random order.

thank to you all !

Josh

Hi,

The random option in the loop window applies to the variables you indicated there (and thus to the conditions your trials will appear in); not to the items you place in a sequence. The sequence will always run its items in the order you placed them in.

If you just have 50 stimuli to which no conditions or variables apply, you could create a list of 50 images (e.g. stimulus_list = ['stimulus1.jpq','stimulus2.jpg', etc.]) in an inline_script. In the sequence, you place another inline script with the following code:

   import random
   random.shuffle(stimulus_list)
   choice = stimulus_list.pop(0)
   canvas = self.offline_canvas()
   canvas.image(choice)

and in the run phase of the inline script:

   canvas.show()

Does this help?

Josh