Thanks Doug
One more, Do I have to perform the pair-wise comparisons onto all significant areas all together?, or can I make it on each one separately?.
Best
Gabriel
> Date: Mon, 13 Sep 2010 10:24:31 -0400
> From: greve@nmr.mgh.harvard.edu
> To: gabriellbk@hotmail.com
> CC: freesurfer@nmr.mgh.harvard.edu
> Subject: Re: [Freesurfer] groups stats doubts
>
> Yes, restrict the pair-wise comparisons to areas where the ANOVA is
> significant.
>
> doug
>
> Gabriel Go.Es. wrote:
> >
> >
> >
> > I'm going to run some analyses and have some doubts with respect to
> > the general approach that I should follow. We want to evaluate
> > differences in cortical thickness in three different groups. Shoud I
> > perform an ANOVA (to know if there is a group effect) followed by
> > pairwise comparisons (to localize the difference)? If so, what should
> > I do if results from the ANOVA and pairwise comparisons are localized
> > in different regions? Shoud I restrict the pairwise contrasts to
> > regions where ANOVA revealed significant differences?
> >
> > Many thanks in advance.
> >
> > Best Regards
> >
> > Gabriel
> >
> >
> >
> >
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> --
> Douglas N. Greve, Ph.D.
> MGH-NMR Center
> greve@nmr.mgh.harvard.edu
> Phone Number: 617-724-2358
> Fax: 617-726-7422
>
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