Dear FSL,
I have a group of subjects with pre and post dti scans and behavioural scores associated with these. I want to weight each subjects pre and post data with their behavioural scores. I'm not sure if the following design would get at what I'd like to do (and I'd probably have to demean EV1 within the pre and post blocks as well)?
Post>Pre Sub1 Sub2 Sub3
EV1 EV2 EV3 EV4
20 1 0 0
18 0 1 0
17 0 0 1
-10 1 0 0
-12 0 1 0
-15 0 0 1
contrast:
c1: 1 0 0 0 (Post>Pre)
c2: -1 0 0 0 (Pre>Post)
Thanks very much for your advice!
Best,
Joyce
|