I met a problem that I don’t think I can solve it by myself. I am asking for your help sincerely.
I have a stimulus set. One stimulus set contains many object categories, and each categories consist of four pictures. The question is that I don’t know how to randomly select one picture in each trial as well as randomly select the object categories at the same time. If it need code to cope with, please inform me in details.
Here’s how my folder of the stimulus set looks like:
Really need your help.Thanks!