the 1st contrast looks correct. I'm not sure what you're trying to do with the 2nd contrast. This would be a test for g1>g2 on the 3rd covariate (essentially an interaction between g1/g2 and the 3rd cov). It would not be a post-hoc test because that's not the test you did in the first contrast.
doug
Jose Luis Cantero Lorente wrote:
Hello,
we are analyzing cortical thickness data from three groups and want to study whether there are between-group differences after removing the effects of three covariates. We are assuming different intercepts and different slopes (DODS) and would like to be sure that the contrasts performed for the ANOVA and for the post hoc comparisons are correct:
ANOVA
1 -1 0 0 0 0 0 0 0 0 0 0
1 0 -1 0 0 0 0 0 0 0 0 0
e.g., post-hoc analysis for testing group1 > group2
0 0 0 0 0 0 0 0 0 0 0 0 1 -1 0
I would appreciate your help with this matter.
Best regards,
Jose
Jose L. Cantero, Ph.D. Laboratory of Functional Neuroscience Department of Physiology, Anatomy and Cell Biology University Pablo de Olavide Ctra. de Utrera, Km.1 41013 - Seville
- Spain -
Phone: +34 954 977433 Fax: +34 954 349151 Email: jlcanlor@upo.es http://www.upo.es/neuroaging/en/
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer