Hi everyone,
I am attempting to analyze the potential differences across several scanning sites, and what effect this may have on my VBM results.
I attached my design matrix I am using (taken from another paper: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2225446/ )
I am doing full factorial, 2 factors (site x group), Site = 5 levels, group = 2 levels, so i have 10 total cells.
I am wondering what contrast would show me total effect of Site, without looking at group differences. Or, dod I have to just look at every combination of sites (e.g. Site 1 > Site 2, Site 1 > Site 3 etc....)
Any help is Greatly appreciated
thanks and best
Anson K.
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