Thank you very much Dough!
I need to check 4 contrasts. I made them based on the freesurfer page, but cant decide if i interpreted them right! Are my contrasts Ok?
If classes are: Patients, healthy control
and variables are: Age, TIV, father age, mother age.
Are these contrasts ok?
R# = 2* (4+1) = 10
contrast1: 0 0 0 0 0 0 -1 1 -1 1>> checking the differences between groups in terms of father and mother age regression out the effect of age and TIV
contrast2: 0 0 0 0 0 0 -1 1 0 0 0 0 0 0 0 0 0 0 1 -1 >> checking the differences between groups in terms of father or mother age regression out the effect of age and TIV
contrast3: 0 0 0 0 0 0 -1 1 0 0 >> checking the differences between groups in terms of father age regression out the effect of age and TIV and mother age
contrast4: 0 0 0 0 0 0 0 0 -1 1 >> checking the differences between groups in terms of mother age regression out the effect of age and TIV and father age
Yas
To: freesurfer@nmr.mgh.harvard.edu From: greve@nmr.mgh.harvard.edu Date: Wed, 8 Jun 2016 09:38:18 -0400 Subject: Re: [Freesurfer] Coordinate system in mris_convert
Try the group analysis tutorial
http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/GroupAnalysis
On 6/8/16 2:39 AM, Dave Yas wrote:
Hello all,
I'm new to surface analysis.
I have 2 groups (patient and healthy control) that i want to check differences between.
I want to perform cortical thickness/ surface analysis.
My categories are
Patients, healthy control, age, TIV, father age, mother age.
Where age & TIV are covariates of no interest. and father and mother age are covariates of interest.
I have already preprocessed the data (recon-all), but how can i proceed?
Any online guide on steps for surface analysis? also making a design such as the above?
Yas
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