I have two groups of fMRI subjects (10 young subjects and 10 old subjects). Both groups performed an AB block design where B was a control task. All data was spatially normalized. I have computed the effects of task A in each individual subject, and for the youngsters as a group, and for the oldsters as a group and for the total group.
How do I determine regions that were significantly more active in the young group than in the old group (and vice versa).
Jerry Allison
Medical College of Georgia
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