Hi, I’ll be running an online psychopy experiment. I usually achieve between-subjects counterbalancing (of assigning stimuli to conditions, etc.) by loading a new excel conditions sheet for each participant. Presumably I can’t do this when I am running it online? Am I now forced to created different…

Hi, This may help :slight_smile: [image] Between-subject counterbalancing via pavlovia Online experiments From what I’ve learned, I don’t think sequential ordering is possible with conditions. Your best option would be to create two separate .psyexp experiments and share…

Hi Nicholas. In my case, I need to use a different conditions file for each participant (randomising the identity of the stimuli). Am I correct in assuming, that if I used your solution it may result in some condition files being selected more than once and others not being selected at all? Thanks!

I have a web app to help with this. See https://moryscarter.com/vespr/pavlovia.php Or https://moryscarter.com/vespr/survey.php

Hi, and thank you! Am I correct in understand that this requires me to ask the participant to enter an ID and/or link with Qualtrics? Is there a way to avoid both of those options?

They are designed to create a consecutive ID on the fly and do not need Qualtrics

Sorry for the silly question, but how do I label my condition files so that the ID generated matches a file? A related but somewhat similar question - have you seen the thread in Todd’s profile titled ‘personalising stimuli’? Out of curiosity, is that also a way to achieve the same end (randomise th…

How many different conditions files do you have? I would label them something like condition0.xlsx, condition1.xlsx, etc. and then use useFile = "condition"+str(expInfo['participant']%8)+".xlsx" if you have 8 different files.

Thank you for the specific instruction! I’ll probably end up using 40 condition files. I will use your suggestion. The reason for my second question was just to understand different ways of doing things.

Any insight why I would receive the following message: ‘TypeError: not all arguments converted during string formatting’.

Please could you copy and paste (into preformatted text) the line that you think isn’t working?

Between-subjects counterbalancing using Pavlovia (assigning different .xlsx conditions files to different participants)

Online experiments

Nicholas_Borg May 6, 2020, 7:09am 2

Hi,

This may help

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Between-subjects counterbalancing using Pavlovia (assigning different .xlsx conditions files to different participants)

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