Hello @lara_k
Look here to see what ‘duration’ means in this context: Measuring key lift time relative to stimulus onset. However, I am not sure that this will solve your problems. You want to register all RTs, not just most of them.
Have you tried addressing any of the issues I mentioned above?
- Saving information to the disk at a time-critical moment;
- using win.flip even though you shouldn’t,
- storing information about the time yourself when PsychoPy can do this for you?
Best wishes Jens