Re: [Freesurfer] Group effect Contrast for 6 groups

2019-10-18 Thread cody samth
External Email - Use Caution Great thanks. On Fri, Oct 18, 2019, 10:09 AM Greve, Douglas N.,Ph.D., < dgr...@mgh.harvard.edu> wrote: > Yes, that is correct. It is testing the null hypothesis A=B=C=D=E=F. That > hypothesis will be rejected if A is different from B-F, which is what

Re: [Freesurfer] Group effect Contrast for 6 groups

2019-10-18 Thread Greve, Douglas N.,Ph.D.
Yes, that is correct. It is testing the null hypothesis A=B=C=D=E=F. That hypothesis will be rejected if A is different from B-F, which is what you are testing. The other contrasts are redundant (and would cause an error if you added them to the contrast matrix)z On 10/16/19 12:03 PM, cody

[Freesurfer] Group effect Contrast for 6 groups

2019-10-16 Thread cody samth
External Email - Use Caution Hi, I'm designing an analysis that will have 6 groups (two factors/three levels). I was wondering if I could get some input regarding my contrast for the group effect. Based on the group effect contrast under the FSGD examples for 3 groups I've