the lab that I work in is currently running an online experiment and it is my job to do weekly backup copies of the experimental data.
When I downloaded the files over the last couple weeks, I noticed that sometimes, participants get lost in the downloads. For example, certain participants are included in the backup from 3 weeks ago, that are no longer included in the downloads from this week.
Does anybody have an idea, what the problem could be and how to fix it?
Thanks in advance for your help!