I have two distinct groups of subjects, controls and adhd (both children). in order to create my melodic_IC files, to be later used as regressor for dual regression analysis, should I fill in a con/mat files that separate the two groups. I mean in the melodic command, not in the final randomize after dr.
generally speaking, if I expect differences between the two groups, do i have to explicit groups before dual regression or only after ? does it improve melodic analysis ?
thanks in advance
regards
Alberto
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