trial duration discrepancy in eyelink data
I'm doing a simple dot probe task. My trials are 2500ms long, using sketchpad for the fixation, images, and probe events nested between pygaze_start_recording and pygaze_stop_recording. I have confirmed that when the task runs it is indeed 2500ms long, yet my eyelink data files show trial durations of ~3275. I have played around with different event lengths, but no matter what, there seems to be an extra ~775ms in each eyelink recording.
Any ideas about the source of this extra time?
Comments
After playing around with variations of the design, I'm finding that what's most likely happening is around ~375ms of delay between the start of recording and the onset of first event, and the rest of the time is a delay between logging events and stopping recording.