The basic contrast is
(PM-PF)-(CM-CF)
If that is positive, then it will be red, otherwise blue
This opens up a lot of possibilities as to what is driving the
interaction, so it is hard to come up with a sentence like the one you
are trying to state
doug
On 02/20/2014 02:25 PM, Yang, Daniel wrote:
Dear FreeSurfers,
I have two discrete and binary factors (Dx: patients vs. controls;
Sex: female vs. male), one continuous variable (Age), one nuisance
factor (IQ). If there is a 3-way interaction of Dx x Sex x Age,
regressing out IQ, is the following interpretation correct?
Red/yellow: In females (vs. males), the Age effect of cortical
thickening is stronger in patients (vs. controls).
Blue/cyan: In females (vs. males), the Age effect of cortical thinning
is stronger in patients (vs. controls).
Note. by stronger, I mean greater magnitude without sign.
Thanks,
Daniel
_______________________________________________
Freesurfer mailing list
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
Phone Number: 617-724-2358
Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
www.nmr.mgh.harvard.edu/facility/filedrop/index.html
_______________________________________________
Freesurfer mailing list
The information in this e-mail is intended only for the person to whom it is
addressed. If you believe this e-mail was sent to you in error and the e-mail
contains patient information, please contact the Partners Compliance HelpLine at
but does not contain patient information, please contact the sender and properly
dispose of the e-mail.