I’m currently building an online experiment and ran into an issue I hope someone can help with.
My condition file contains 72 rows, and I want to randomly select 6 rows in each loop. To do this, I created a list called stimnum_cong containing the numbers 0 to 71. At the beginning of each loop, I shuffle this list, take the first 6 numbers, and store them in a new list called stimnum_sample. These selected numbers are then removed from stimnum_cong.
After that, I use the variable $stimnum_sample in the selected_rows field of the loop control. However, when I try to run the experiment online, I keep getting errors during this process.
I suspected the issue might be due to the data type of $stimnum_sample, so I tried converting it to a string using the following code:
# Convert stimnum_sample to a string
stimnum_str = ','.join(map(str, stimnum_sample))
Then I used $stimnum_str in the selected_rows field instead—but unfortunately, that didn’t work either.
I’m fairly confident that the issue here is that you are setting the selected rows as a string of comma-separated indices instead of a list.
Try putting $stimnum_sample in your loop. If you’ve already tried this and get the same error then perhaps there’s an issue with your create of stimnum_sample. Try printing it to the console.
