I am trying to put together a vigilance task where pictures flash rapidly on screen and participants have to press the space bar every time a target picture comes up. Ideally I want their reaction time for pressing the space bar after the target stimulus was presented so I can say that some pictures were identified faster than others.
I have it set up okay as far as timing (I have the pictures and ISI’s coming up as quickly as I’d like), but the reaction time data is always recorded as 0 on the results. I have all of my events set to record reaction time and I established that pressing the space bar is the correct response.
Does anyone have any suggestions?