Thanks, Christian. That does help.
I have a follow-up/related question.
I am using the fdr command to threshold my group-difference contrasts. I see that there is a masking option in the fdr command. Should I be including my activation mask (or deactivation mask, as it were) within the fdr command itself, or should I just be multiplying the fdr-sans-mask output by my activation (or deactivation) mask afterward in order to understand the results (e.g., if fdr thresholding of my groupA>groupB contrast returns results that happen to be within the regions of my deactivation mask, this would indicate that groupB's deactivation in those areas was stronger than groupA's)?
Leslie
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