I have an experimentation of n-back.
I have letter that appear for a maximum of 2.5 sec and then a fixation cross for 0.5 sec.
Right now: When the participant pressed on the keyboard, it ends the routine and go directly to the fixation cross. I have 60 letters so the experimentation would take at max 3 minutes, but it can be less if the participant pressed fast.
What I want : My experimentation should take 3 min at every time. So the fixation cross should stay for more than 0.5 sec if the participant answer fast.
Thanks for your help!