Hi Wen,A similar question appeared in the list recently, please see here: https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=FSL;bf6 7a4e.1612 All the best,AndersonOn 15 December 2016 at 15:21, Leslie Cao <[log in to unmask]> wrote:Dear FSL experts,I am trying to set up a GLM of 3-groups, 2-levels per subject ANOVA. So 62 subjects underwent 3 different procedures and each of them have 2 different levels of measurement. How can I set up a 2 by 3 ANOVA to see the main effect of level across 3 groups? I checked the wiki for 2-group,2-levels, but I am not sure how I can apply that with an additional group.Thanks,Wen