Randomizing without repetition in loops

[hndprn]

Hello everyone,
I’m completely new to PsychoPy without any coding experience, and I would really appreciate any sort of help.

What are you trying to achieve?: : I have 90 pictures and 3 different conditions.

What did you try to make it work?: : I want each condition to appear in a pseudo-randomized order i.e., not more than twice in a row and without repetition.

What specifically went wrong when you tried that?:. : I managed to make it in a randomized order. But i’ve still problem with repetition.

How can i prevent this?
Any help will be greatly appreciated.
Thank you!

code : import random, xlrd
from numpy.random import choice

trial_loop = loopType : random
nReps: 30
conditions : loop_repetititon.xlsx → nReps1, nReps2, nReps3

[JensBoelte]

Hello,

this question has been asked before. Look here

Randomise stimuli without consecutive presentation

Hello you330, you need some code to do this. These should give you the relevant information. Best wishes Jens

or here

Randomisation without consecutive presentations

@Mirjam provides a general solution here: In your specific case, something like this might work: Insert a code component on your trial routine (from the “Custom” component panel). In its “begin experiment” tab, put something like this ( we need to run this at the start of the experiment since the code is non-deterministic: we don’t know how long it will take to run (realistically though, it will be a fraction of a second for only 12 entries): stimulus_list = ['v', 'b', 'n', 'm'] * 3 shuffl…

or here

Randomisation with constraints

Offline or online?

Best wishes Jens

[hndprn]

Although I am late in responding, I thank the recommendations.

We added additional conditions besides the picture in three separate trials, which is how I came up with the following answer and avoided repetition: I created a list and prepared each condition as an excel file. I then used the pop.() function to stop the repetition.