Millisecond Forums

Hi Inquisits,

I am currently working on a GoNoGo-task which involves a default dot, the test person has to fixate. This dot then, in random time spacings of a few seconds, turns into one of two symbols. The test person has to only press the space bar, if the right symbol appears...but then as fast as possible. My issue now is, that the GoNoGo-symbols only appear for 200ms before returning to the default dot. Since reaction times cannot be faster than those 200ms, the test persons answer usually takes place, when the symbol-trial is already over. This results in the system assigning the buttonpress to the dot trial after. I already thought about changing the dot trials after each of the symbols the test person hast to react to to response trials. So then actually the response to the dot after and not to the symbol itself would be counted. However, then reacting times would be confused and not be beginning from the GoNoGo-trial on.

I hope I was able to describe my problem sufficiently. Is there any way, to assign a response to a trial which has already expired and a new one has started?

Thanks so much
Isabel