Hi,
I would like to compare resting state data (with NO repeated measures) between 3 groups of subjects, and I would like to adjust for covariates (age and sex). I would like to know whether the group differences (and the direction of the difference (i.e group 1 vs group 3, group 2 vs. group 1 etc.) remain after adjusting for the covariates. Additionally, I would like to test the inferences for the covariates. I saw on the GLM "menu" that it is possible for two groups, is it also possible for 3 groups? If yes, how should I modify the model of the two groups to the 3 groups?
Many thanks,
Rotem
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