Video playback and keyboard response
For my lexical decision task, I play a video clip and then collect a response (left for sign and right for nonsign) on the keyboard. The subject has 2500 ms to respond from the moment the video starts playing. Ideally, the moment the key is pressed, the next trial is called. When I set the timeout for the keyboard response as 2500 and the duration for the mpy as kepress, the video just freezes and then moves on to the next trial after the remaining time. I have to press the response keys twice to record the response and move on. I tried two variations:
1.The duration for mpy as 0- the video doesn't play, a single frame appears
2. The duration for the mpy as 2500- the same as when the timeout for keyboard is 2500.
What can I do? I need to record the response time from the moment the video plays and the time available to respond is 2500ms (the videos are all between 1000-2000ms)