Hi. Thanks for the quick response. I´m sorry if it isn´t clear. What I would like is for the subject to be able to respond both during and after the 300ms, while the text is on the screen and also during the 5 seconds waiting time after it has been removed. But, I need a response during the 300ms to cancel the second waiting time. That is a response during the 300ms is captured and then the program just moves on to the next trial. A response after the 300ms sould have the same effect, captured and move on. Thanks!