It seems parts of data cannot be recorded from Jan. I lost 4 participants’ data (a total of 10), one reported he couldn’t finish the experiment, and the experiment stuck on the ending page, so he had to close it manually. Another one reported that there was an error (the participant forgot what error was) when he pressed space to finish it.
From Jan., this is the second time that data loss happened. It didn’t happen before.
Many thanks for your help.