Dear Freesurfer Mailing List,
I am running a GLM in freesurfer 2 categorical variables (2 levels), and three continuous variables (age, prs, & sles). My fsgd file looks like this:
GroupDescriptorFile 1 Title GLM_sles-group-gender-age Class genderMale-groupControl Class genderFemale-groupControl Class genderMale-groupAtRisk Class genderFemale-groupAtRisk Variables age prs sles Input ID_001 genderFemale-groupAtRisk 20 21 96 Input ID_002 genderFemale-groupControl 21 13 79 ...
I want to test for an interaction between prs and sles, while controlling for age, gender, and group. Can you tell me if the following contrast vector will correctly test for this interaction:
0 0 0 0 0 0 0 0 0 0 0 0 0.5 0.5 0.5 0.5 0 0 0 0 0 0 0 0 0.5 0.5 0.5 0.5 0 0 0 0
