Reaction Time

[Amberd123]

Thanks, I'll try that.

I want the program to start counting the time elapsed as soon as the screen appears and I want to press a button so that the screen disappears and it calculates the total time elapsed.

What I want is for the screen to appear for 10 minutes unless the participant comes to get the experimenter where the experimenter would push a button and the screen will close - thus ending the experiment. This way the reaction time could vary between 0 and 10 minutes. Is this possible to do with your recommendation?

[jarvis24]

Yes, you could use an instruction screen with a (d600) parameter to have it up for 10 minutes (600 seconds) before continuing automatically to the end. The secret key sequence ctrl+right could also be used by the experimenter to end the item early at which time the actual exposure time would be recorded as of that moment. Does that help?