Hi,
I have a main regressor ("ON") and the contrast of interest in my initial GLM is simply to compare brain activation related to this main regressor against the baseline. Now I have a seed region and, in gPPI, I know I can set up a gPPI model to identify brain region whose time course correlation with the seed region is significantly enhanced during "ON".
I have 20 trial repetitions during "ON" and I have a trial-wise behavioral measure (i.e., 20 measures). Suppose what I want to isolate is the brain region whose time course correlation with the seed region is significantly enhanced and covaries with the trial-wise measures during "ON", how to set up the gPPI model?
I appreciate for any help.
Manuel
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