yes, where "stronger" means greater in magnitude ignoring the sign
doug
On 2/17/14 10:41 AM, Yang, Daniel wrote:
I see. You are saying that the interpretation can be made in two ways:
blue/cyan =
the cortical thinning effect of Age is stronger in patients (vs.
controls)
Or, the cortical th
Yes, you should see cyan. Note that you would see cyan if group1 slope
is 0 and group 2 slope is positive. Probably not a problem with age, but
it is just something to think about.
doug
On 2/17/14 1:38 AM, Yang, Daniel wrote:
Dear FreeSurfer developers and experts,
If I have a binary fac
Dear FreeSurfer developers and experts,
If I have a binary factor (Group1: patients, Group2: controls) and a continuous
variable (age), I know I can follow Contrast2 in the following wiki to test the
interaction effect.
http://surfer.nmr.mgh.harvard.edu/fswiki/Fsgdf2G1V
Contrast2: [0 0 1 -1
