Blocking a keyboard-response - Question
I am working on a simple reaction time experiment. The participants are supposed to press the Space bar in the interval of one second as accurately as possible. After the practice trial, i build in a scetchpad for 5 seconds which should be a signal for the participants to stop pressing the Space bar. After that another sketchpad follows, which contains the instructions for the following experimental trial. This one should be ended via a keyboard reponse (Space). I noticed that the second sketchpad is skipped when I press the Space bar during the time in which the first sketchpad (the one which is shown for 5 seconds) is shown. This should not be the case. Can anyone tell me whether it is possible to block the keyboard response for the first sketchpad so that the second sketchboard is not skipped when someone (accidently) presses Space?