Dear Experts,
I like to conduct a 3 (positive / negative / neutral) * 2 (congruent / incongruent) event-related fMRI-design.
Is it possible to have different numbers of trials for different conditions?
As I do not have much scanner-time, and because I think that the positive-conditon, relative to negative and neutral, might have the smallest effect size,
I like to increase the number of trials for this condition, while decreasing the number of trials in the other conditions.
Is it possible in general and if so can the resulting data be analyzed with SPM?
Thanks a lot!
Best wishes,
-Lucas
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