On 5/7/17 1:16 PM, Laura Ferrero Montes wrote: > Dear FS team, > > Thank you very much for your help. Just a few more questions. > > I want to perform a statistical analysis between two groups:controls > and patients, using age and IQ as covariates. First I have to test if > there is an interaction between group and covariate using DODS. > > My questions are: > > Q1) Do I have to test age and IQ separately, or together? I'm not sure, but I'd say together > > Q2) In case that there is not interaction in any of the covariates, > can I use the same FSGD file but do I have tu run it as DOSS? How it > could be done? Yes, you can use the same file. When you spec the fsgd file, just add doss afterwards, get --fsgd myfsgdfile doss > I would appreciate if you could give me some hints or examples about > the matrices and contrast files that I must use. You have to change the contrast matrix. See this page for help https://surfer.nmr.mgh.harvard.edu/fswiki/DodsDoss > > Thank you, > All the best, > > Laura > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > >
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