On/Off latency for starting/stopping recording eyetracker data
I was just wondering if anyone knows of the kind of latencies one can expect when using the pygaze_start_recording and pygaze_stop_recording items in experimental trials?
To give some background: I'm looking at some simple visual search tasks and want to record eye movement during the trials. I would expect the 'active' part of the trials (i.e. when the participant is searching for the target) to only last a couple of seconds at the most, and just wondered whether my method of recording the ET data was reasonable?
The order of events for a trial is basically:
show fixation point -> remove fixation point -> start_pygaze_recording -> show stimuli -> wait for keypress -> stop_pygaze_recording -> record_keypress -> show mask
I know I could actually figure the timings out myself but I don't have access to the eye tracker at the moment. Any thoughts very welcome!