Yes, once you take the difference between two time points, then the
steps are the same as cross-sectional analysis. But if you took the
difference, you should have only one entry in the FSGD file for each
subject (looks like you have 2). Also, it is probably a good idea to
normalize the ages (o
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Good morning Freesurfer Team!
I would like to use GLM on my longitudinal study to measure change between two
time points. I followed the longitudinal tutorial, and to my understanding, I
would move on to the general glm tutorial next. The longitudina
