I’m trying to make my experiment to work both online and offline and I ran up with this problem. I have a routine that starts with a fixation cross, it starts at 0ms and ends at 5ms. Then a line is presented from 5ms untill there is a key press.
Online this works fine, so the fixation cross disappear and then the line appears. At least as much as my eyes can tell. But offline the fixation cross is briefly still present after the line is presented.
So fat I fixed by adding .05 seconds to the start of the line, but I want to know if this is normal or am I missing an option to prevent this overlapping?