Hi Gonzalo, that contrast will not do the conjunction. You can do a conjunction explicitly by running mri_concat on the sig.mgh files for the age contrast and the cognitive measure contrast. Use the --conjunct option. doug
Gonzalo Sanchez Benavides wrote:
Dear Freesurfers,
I'm exploring the relationship among cortical thickness, aging and some cognitive variables in a sample of healthy elders, and I want to test this relationship regardless sex and years of education.
I think is easy to make contrasts to explore separately the correlation between age (or a cognitive measure) and thickness. However I am wondering if its possible to know the areas in which both correlations coincide.
Does it make sense to use a contrast like this for such purpose?
0 0 0.5 0.5 0 0 0.5 0.5 sex age edu cognitive measure
Many thanks in advance for your answer
-- Gonzalo Sánchez Benavides
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer