Thnaks for explanation.
I plan to play an auditory recording for the participants which are some pre-recorder questions and participants should answer verbally as soon as they know the answer. I need to measure the time latencies of the verbal answer, I mean from offset of the auditory questions to onset of verbal responds. To get the precise result, do you suggest to define a pressing key element or clicking element before participants get start to be recorded and ask them to click before recording (which gives participnats some times to think wich is not desirebale) or just start recording element straight after playing is finished. In latter case, how we can measure the time of participants’ onset of speaking (which maybe is delayed than the start of recording and this is what I am going to measure).
I hope I explained it clearly.