Hello all,I'm trying to test the effect of some medical treatment using randomise.The experiment was paired design, so I obtained fMRI data at pre-treatment and post-treatment.But, the intensities of treatment were varied between subjects.Therefore, I try to test using both of model of "pre/post categorical variable + treatement intensity variable (0 in the case of pre) + subject categorical variables" and model of "treatement intensity variable + subject categorical variables".In these cases, how should I make the .grp files?Thanks,Hiroki