Have you looked at my presentation on group analysis? The slides are here:
http://surfer.nmr.mgh.harvard.edu/docs/ftp/pub/docs/freesurfer.groupanalysis.pdf There's a very similar design on slides 23 and 24. doug Zhangyuanchao wrote: > Dear Mr or Ms, > I have read the FreeSurfer Tutorial: Group Analysis, but there are > still something I do not quite understand. I want to make comparison > of lgi between two groups, namely, normal control groupand patient > group. I want to regress out gender and age.For example,if I have 4 > subjects:nc1 male age=30,nc2 female age=31,patient1 male age=32, > patient2 female age=30, how should I create the FSGD file?How should I > design the constrast vector? What kind of test does Freesurfer > use,F-test or t-test to detect difference regionof thickness orlgion > the surface? What should I do if I want to use t-test to detect the > difference between two groups? How should I set the option of the > command mri_glmfit --sim nulltype nsim thresh csdbasename if I want to > set the p-value threshold 0.05? > Sorry for the trouble! > Thank you very much! > Yuanchao Zhang > > ------------------------------------------------------------------------ > 雅虎邮箱，您的终生邮箱！ <http://cn.mail.yahoo.com/> > >------------------------------------------------------------------------ > >_______________________________________________ >Freesurfer mailing list >Freesurfer@nmr.mgh.harvard.edu >https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > -- Douglas N. Greve, Ph.D. MGH-NMR Center [EMAIL PROTECTED] Phone Number: 617-724-2358 Fax: 617-726-7422 In order to help us help you, please follow the steps in: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
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