Hi,
I have a naive question. I have 3 EVs (A, B, and C) and my interest is the contrast "A>B" (the trial repetition number for A and B are all 30). However, I would like to show that my experiment did evoke activation in typical sensory-related brain region using contrast "A>C" (the trial repetition number for C is 50). My first question is, should A and C be with the same number of trial repetition (it is just for a validation to show that our paradigm induced activation in sensory-processing areas)?
Thank you.
Manuel
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