URL of experiment: https://pavlovia.org/ama_lab/memory-for-the-past
Description of the problem:
I am running an experiment online and recruiting participants using Prolific. My experiment has 12 counterbalances (versions) and I am randomly assigning participants to each using the program provided by @wakecarter here Updating Conditions File for Each Participant.
When I opened the experiment to participants, about 25 out of 170 of those who took it, messaged me saying that it froze and would not advance (they would type in the word and press enter, like they should and the screen would not change, although they could erase the word or add to it; some also said they tried pressing a bunch of different keys and that did not work either and some even tried redoing the experiment and that it got stuck on the same screen). For all participants the experiment froze on the same part: the task is learning two passages and taking a test after each passage, and it froze in the second test. For most participants, it was on the first screen of the second test but there were some that said it was on a different screen in the second test. Additionally, most of the people who complained, encountered the problem in one or two versions of the experiment, although there were people who encountered it in another version.
I ran through those versions several times to try to recreate the issue, but could not. I saw that some other people were having the same problem: Task crashed or froze for 30% of online participants, Pavlovia: black screen and unable to continue (RAM issues), Online study crashes on Windows Chrome. The participants for whom the experiment crashed said they were all using chrome.
My experiment does have to load about 175 objects, do you guys think that is the reason this is happening? Could there be any other reasons? Why is it always in the same place in the experiment?