I am trying to run a pseudorandom block in which I am presenting 24 images in a random order but I need to make sure the first two and last two images are fixed across multiple iterations of the programme. Could anyone help me implement this pseudorandom order for my task? I primarily used the build…

@movivi , you could still use Builder for this with no coding required. You would need 3 routines, all the same, except each routine has its own loop. The first routine would have a loop of 2 trials presenting the images in sequential order, the next routine would have a loop presenting the images in…

Sorry to bother you~ I have a similar question: I want to have the first colume of my loop excel “sequential” while the others are “random”, but I can not find a solution to this question because the Psychopy only allows for one loop.xlsx and one looptype in a loop. Thanks a lot if you can spare y…

Did you find a solution? I currently have the same problem. I need one of my excel columns read sequential whereas the other should be read randomly. Is this even possible? Thanks! :slight_smile:

Sorry, I haven’t solved it. Maybe you can try to find an alternative solution :laughing: I finally completed my experiment, but I can not remember why I raised this question :joy:

Too bad! But thank you eitherway for your fast response! :slight_smile: I will probably have to come up with another solution, then :smiley:

Have a look at my independent randomisation demo. [image] PsychoPy Online Demos Blog If you have routines or experiments that are likely to be useful to others, please create a post in this thread, editing your post to add new demos so there is one post per creator. Ideal…

Mixing sequential and random order for a block

Builder

wakecarter February 11, 2022, 3:54pm 7

Have a look at my independent randomisation demo.

Topic		Replies	Views
Both “sequential” and “random” in one loop Builder randomization	4	459	October 13, 2021
Randomising each trial with builder Builder	4	716	March 29, 2019
Block randomisation Builder randomization	7	1208	May 14, 2021
Block randomization Builder	0	108	June 17, 2024
Pseudo-randomization of stimuli trials in a loop Builder randomization , code	4	2325	April 14, 2022

Mixing sequential and random order for a block

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