Hi SPM experts,
My experiment is a working memory ("wm") task, in which the first stimulus (s1) was presented, followed by a 5 sec wm interval and then the second stimulus (s2). Both s1 and s2 are events (electrical stimulus), each lasting for 10 ms only. Let's say that the onset time of s1 in a trial is at time 0 sec. Since its an event, I specify the onset time of s1 as 0 sec in SPM analysis, and its duration as 0. My question is, how should I specify the onset time and duration of the EV "wm" of this trial? Onset time = 0.01 s and duration = 4.91 s?
Thanks
Mike
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