Hello everybody, I’m a novice in psychopy and i’m trying to counterbalance between participants two trials containing two sets of stimuli (my stimuli are words) separated by a break. I want to do that to avoid order effect. Here you can see my experiment structure: To do that, i’m a little bit los…

Hi @DocPsy , please use backticks around your code, it makes it easier to read. What you could do is have your trials in a conditions file, and have two separate conditions files for each condition to satisfy your counterbalancing requirement. Your conditions files could be called ‘orderA.xlsx’ and …

Hello @dvdridges, thanks for your answer Where could we put the two files “ordre À and B”, in which loop? Thanks

So you want Order A and Order B to alternate, so that trials loop might be order A and trials_2 would be order B? If so, then slight adjustment to be made. Add “condition” to the experiment info, but instead of a single letter i.e., ‘A’, you enter the order ‘A,B’ or ‘B,A’ separated by commas, no spa…

Yes but I want the participant will see the both trials but sometimes I will start by bloc À then bloc B and other participant start by B then À. Is it still good ?

Yes, see the last post. Give that a go and let us know how you get on.

So, I’d tried to do it. I created two order of my stimuli like that: I insered two to order A and B in the condition space in psychopy like that (exemple for loop “trial”) [Capture] But the programm doesn’t run because “Mots” is not defined… However, I have defined it in text properties and I c…

Right, just for info, it would be useful if you could make the method more precise in your initial post, as you would in a methods section, then we provide more useful help. What you want can be achieved using nested loops, see image: [nestedLoops] In the blocks loop, you will want to define your…

Yes, I’m doing a lexical decision task with a feedback after a wrong answer. I created to trial to propose a break in the middle of the task. I want to contrebalance these trials So, I realised an other loop but the programme doesn’t run. A black screen stay in the display… Maybe I have doing Some…

The version you have sent me does not include the codes I have sent you. Here is my version which works, with excel files for you inspect. If you can get one of your blocks to match my version, hopefully you can get something running. nestedLoops.psyexp (10.8 KB) OrderA.xlsx (9.2 KB) A.xlsx (7.8 …

Ok my mistake, I wrote the code in the bad place. So I tried to do the modifications but this dark screen still appear. Here the modified file. I created a section “condition” in experimental settings and tried to run the experiment with; “B,A” for the purposes that the participants sees Bloc B and …

Counterbalancing experiment?

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Counterbalancing experiment?

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