Hi Levi,

Here are examples of FreeSurfer Group Descriptor (FSGD) files and contrasts for testing various hypotheses

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Best,

Yujing

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> On Behalf Of Gavette, Levi William
Sent: Wednesday, July 12, 2023 11:21 AM
To: freesurfer@nmr.mgh.harvard.edu
Subject: [Freesurfer] Matrix setup to examine group effect between three groups, one covariate (age) as nuisance variable

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Hello FreeSurfer community,

I am looking to perform a GLM between three groups with the single covariate of age as the nuisance variable. I am wondering how to set up my matrix design so that the output will be the group difference with age removed? Any help is really appreciated.

Thanks,

– Levi