Hi Andrew,

Thank you very much for your help.

I've applied the design that you mentioned for the correlation but a further question arised: 

I use difference correlation matrices (TP1-TP2) and a design matrix with 3 columns: 1.) Constant 2.) Age 3.) Difference in a behavioral measure (TP1-TP2)

The contrast file would be [0 0 1] for testing a positive correlation between the connectivity and the behavioral measure, would that be correct? For testing a negative correlation do I have to use -1 instead of 1 or do I have to multiple all correlation matrices with -1 and again use the same contrast file?

Beste wishes

Vivian