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?