Dear Freesufers, I am currently running mri_glmfit using a relatively simple design: Two groups and one covariate. Design is: 1 -1 0 0 .. to control for the co-variate (age).
It is the example with two groups and one covariate in your web-page http://freesurfer.net/fswiki/Fsgdf2G1V I was under the impression that I was comparing two groups controlling for effect of age .....but it seems more like the results I get is displaying regions that is more strongly correlated with age in one of the groups (thus an interaction test). Is this correct - and if so - is the way to go 1 -1 0 (and change to doss)? thanks Eric
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