ROI-to-ROI analyses question

Hi,

I have what is probably a rather basic question re. ROI-to-ROI analyses in Conn.

I have 2 sets of ROIs, each of the two sets related to a particular function. I have created these ROIs from MNI coordinates using Conn's ROI Tools (Thank you for this great new function!).

I am interested in examining FC strictly [i]between[/i] these two sets of ROIs (ignoring any FC [i]within[/i] the 2 sets). That is, if I have 5 ROIs in Set A and 5 ROIs in Set B, I just want to look at FC [i]between[/i] the ROIs in Sets A and B, but ignore any A-to-A or B-to-B ROI FC. (I don't have any specific hypotheses about which particular ROIs in Set A might show between-group FC differences with particular ROIs in Set B, however.)

I have tried to do this by adjusting the contrasts in the second-level results window. However, I cannot get any contrast such that in Results Explorer I only see FC [i]between[/i] the two sets of ROIs. It is quite possible that I am not setting the contrasts up correctly, though.

Any suggestions concerning what I should be doing differently would be greatly appreciated!!  

Thank you,
Goldie