Dear FSL list experts,
This is a question about a TBSS/randomise analysis.
I ran correlation between scalars (e.g FA) and FSIQ in two groups: a clinical group and controls. The clinical group has a significant correlation between FA and IQ whereas the control group does not.
I would like to check and see if these correlations are significantly different between groups (obviously the groups are much larger than this example).
Would this model answer this question?:
EV1 EV2 EV3 EV4
1 0 IQ 0
1 0 IQ 0
0 1 0 IQ
0 1 0 IQ
contrast: 0, 0 -1 1 and 0,0, 1,-1
Also - should the IQs be demeaned?
Thank you,
Naama