I have 21 subjects assigned to 3 treatment groups: Control, Treat X, and Treat Y. Scans were conducted at 4 levels of the n back (0, 1, 2, and 3 back) pre and post treatment. I am interested in
(a) mean activation within each group at each time point, (b) changes within each treatment group as a result of treatment and (c) how the outcomes of the treatments differed from one another. First level analyses were
done on the pre and post scans for each subject with separate copes for each level of the n-back
and copes for the difference between 0 back and other levels of the n back (see below for a sample). Copes 1-3 were masked against the higher n back levels. Copes 4-6 were masked against the 0 back.
However, I’m not sure how to set up my higher level analyses. Any suggestions?
o
M. Omar Faison, Ph.D.
Associate Professor/Chair, Biology
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