Hello.

I am interested in looking at preparation for inhibition using an oculomotor task. My design consists of two trial types - antisaccade and prosaccade. Each type has a cue and a response. The only difference between the two trial types is the instruction given in the cue (anti or pro); the responses are both an eye movement. My main interest is what happens during the cue time in the antisaccade trials.

Is it necessary to jitter the time between the cue and the response in order to pull apart these two trial components? I would rather not do this so as not to introduce working memory. So, is it sufficient to present the components so that they do not always go together? For example: I am equating the responses for both types of trials. If I present three trial variations - 1. anti cue - response, 2. pro cue - response, and 3. anti cue only - with jittered ITI, is this sufficient to pull out activation related to anti cue, pro cue, and response using three regressors in 3dDeconvolve?

Thanks in advance.