keyboard reaction wanted

Hey all,
I'd like to save the reaction time by keyboard input. That is, I'd like to show pictures to the subject after instruction, and then he has to react "yes" or "no" by keyboard or immediately rather than mouse click input. Could you please help me to edit the experiment? Thank you a lot!!!

There is an option in the "Details" window labelled "Reaction Time" that will allow you to record the reaction time for most item types.