I have the following experimental paradigm:
1. patient and healthy control groups
2. each subject has two separate scanning sessions on 2 days
3. on each day subject has fMRI task followed by a)active substance OR b)placebo
administration and repeat fMRI task
I wanted to confirm proper design matrix construction to test the question of whether
activation deltas (post - pre substance administration) differ among group A and B
My thought is to use a variation of the Multi-Session & Multi-Subject (Repeated Measures
- Three Level Analysis) scenario on the FEAT webpage but instead of running the initial
fixed effects analysis on subject mean COPEs, run it instead on COPEs generated by a
fixed effect analysis of before and after condition for each subject.
Not sure if this is correct or how to design the matrix. Any advice would be much
appreciated.
Tal.
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