29 Sep
2013
29 Sep
'13
8:30 a.m.
Dear FreeSurfer experts,
thanks a lot for your solution. It works fine. I have some further questions to polynomial fitting with qdec, to prevent misunderstandings from my point of view.
Only to be sure:
1) Linear effects of age: age as continuus factor. 2) Quadratic effects of age: age (quadratic) as continuus factor and age (linear) as nuisance factor. 3) Cubic effects of age: age (cubic) as continuus factor and age (linear) as nuisance factor. 4) Linear+quadratic+cubic effects together: i will have to use mri_glmfit with FSGD file.
Best wishes
Daniel...