Re: [Freesurfer] Matrix setup to examine group effect between three groups, one covariate (age) as nuisance variable

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Hi Levi,

Here are examples of FreeSurfer Group Descriptor (FSGD) files and contrasts for testing various hypotheses https://secure-web.cisco.com/1VPM48Rx8n-O3pwPy_s2hzAZX2WUWqjFwuTdIGDmxPsyOhD...

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

External Email - Use Caution 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