Yes, that will test the interaction effect. Cheers, Jeanette On Thu, Mar 7, 2013 at 12:44 PM, Jie Yu <[log in to unmask]> wrote: > Dear Jeanette > > Thanks so much! > > So I guess I will just use that GLM design ( which I posted today ) with > the contrast ( 0,0,0,0,0,1,-1) and (0,0,0,0,0,-1,1)??? > > Thanks! > > >