E-Prime timing help for fMRI experimental design
Im running into a programming doozy on E-prime 3. I am programming an fMRI paradigm where participants will view stimuli and make a number of ratings while in the scanner.
When making a rating, the duration has to be set to a consistent time from trial to trial. I am wondering - am I able to create a rating slide where if the participant makes a rating, the screen changes to a fixation for the remainder of that slide duration? Meaning, if the participant didnt use up the entire slide duration to make their rating, it would give the participant an idea that they made a response and are waiting for the next slide.
My challenge is that slide duration sets all e-objects to the same duration so I cant overlay the rating screen that would disappear, revealing the fixation. Im not sure what else Id use because it's not technically feedback and Im not sure if slide-state is a solution either.
would greatly appreciate feedback of the minds!