Hi everyone, I have very specific randomization requirements, and for this reason the “random” trial option for the conditions file will not work for me. I created a script that generates the randomization that I need and writes it to a conditions excel file, allowing me to use the “sequential” opt…

If you have a large set of condition files, as Becca mentioned, you can use this code: import glob # append all files to a list named allConds allConds = sorted (glob.glob ('Condition*.csv')) thisCond = allConds[int(expInfo['ID'])]

Does this work for online experiments? I wasn’t sure if the import would raise a JS error?

Oh, I did not pay attention to the online tag. Sorry. No, it won’t work for online experiments because glob is a Python library. However, the problem of this approach is that, if the experiment contains a large number of condition files, it takes several minutes for those file to be downloaded for…

Ah I see! Does the solution from @wakecarter above provide a route round that issue?

Not sure. But I do not think it could solve the issue with downloading all the files. The issue of random selection is solvable. Maybe by using this line of code: var allConds = ['Conditions1.csv', 'Conditions2.csv','Conditions3.csv']; const thisCond = allConds[Math.floor(Math.random() * allCond…

Will this help with downloading the files? [image] Loading sounds on the fly Online experiments I was wrong. The fixed that actually fixed it was changing to the command psychoJS._serverManager.downloadResources rather than psychoJS.downloadResources. I think there’s a …

But, is there anything like the participant number in an online experiment? Thanks!

As in to automatically count how many participants have already completed your experiment, and then use that to index the correct conditions file? I am not sure that function is supported yet. But it might be possible to create a .csv output that has a counter in it that is added to each time a par…

You can’t output a custom csv file online so you would need to assign participant via a website that forwards to Pavlovia. I tried via the quota function in Qualtrics but it failed and assigned the same participant number to participants whose Qualtrics sessions overlapped. Would people like me to…

That sounds like it would be an really useful resource. Thank you for your contributions, they are incredibly helpful! edit: If you have time of course!

Updating Conditions File for Each Participant

Online experiments

wakecarter May 22, 2020, 8:29am 9

Will this help with downloading the files?

Topic		Replies	Views
Between-subjects counterbalancing using Pavlovia (assigning different .xlsx conditions files to different participants) Online experiments	30	2869	November 15, 2021
Selecting a condition file for each participant and make sure it's not assigned twice across participants Online experiments	6	1288	October 4, 2022
Assigning participants randomly to a condition Builder randomization	31	7958	May 21, 2022
Choose input file depending on participant id Online experiments randomization , pavlovia	10	1042	February 1, 2021
Deal with condition files on psychojs/pavlovia Online experiments online , pavlovia	13	1347	November 2, 2022

Updating Conditions File for Each Participant

Related topics