Hi,
Are you sure? The third picture (target) is already by RT reduced – in E-Prime presumably set to terminate (default) – otherwise it wouldn’t say < 2000 ms (average RT for a flanker task will be around 400, 500 ms). That means the duration of the 4th screen needs presumably be lengthened to increase to a total of ca 8 s (sounds to me like an fNIRS/fMRI paradigm, right?). For example, let Target be your target screen, and PostTarget the fourth screen. You use a jitter variable for the randomized post-target duration, let’s call it PostTargetDuration, which is an attribute in your list and added in the Target duration property as [PostTargetDuration]. Simply putting this as an inline after Target should suffice:
c.GetAttrib (“PostTargetDuration”) = c.getAttrib (“PostTargetDuration”) + Target.RT
So if the RT to target = 500 and normally the duration would be 3000 ms, it will now be 3500 ms.
Not that it’s going to matter for a BOLD design, but ok!
Anyway, if you’re right and the RT needs to be subtracted from PostTarget’s duration then it’d be fairly easy to fix the above, right?
Best,
Michiel
From: e-p...@googlegroups.com <e-p...@googlegroups.com>
On Behalf Of ???
Sent: Monday, July 29, 2024 1:12 AM
To: E-Prime <e-p...@googlegroups.com>
Subject: Setting Duration - RT
I want to set the duration of the fourth picture, the duration has to be deducted RT.
For example, duration = 3000ms - RT 1000ms.
How to set it? Is it correct to set the timing mode of the fourth picture as "Cumulative"?
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