Dear Dr. Greve:

Thank you so much for your time and help. I am working on the Paired Analysis that you suggested. Very appreciated!

I am interested if there are different within-group changes in brain structure for an Intervention (PA) and Control (C) group.

Does the paired-diff.fsgd file (peek below) look correct?

PAC Groups

Class Main

Variables Group

Input sub107 Main PA

Input sub112 Main PA

Input sub113 Main C

Input sub118 Main PA

Input sub131 Main C

Input sub132 Main C

Input sub136 Main C

What would be the contrast of interest to include for my question?

Just want to make sure I am running the correct model.

I am also reading the guide about how to interpret the results of the mri_glmfit commands (e.g., https://surfer.nmr.mgh.harvard.edu/fswiki/mri_glmfit). Is there another guide to follow regarding the output of the Paired Analysis?

I appreciate your guidance!