Thanks, Alfonso!

Using pre-formatted AAL ROI files has been a real time saver.

The analysis seems to work fine and I can retrieve all measures (local efficiency, global efficiency, betweenness, so on) from the *.network file.

My question now is about interpreting the group contrast ( [1 -1] ) results.

In other programs (e.g. FSL) this contrast would highlight areas of the cortex where a measure is greater in "group A" than in "group B".

I ran this contrast and several nodes became highlighted in the graph-theory window. My question is this: what metric is being compared at those nodes? "GlobalEfficiency" is selected as the "Analysis measure" on the left side of the window, but GlobalEfficiency pertains to an entire network, not a single node. In other words, I didn't think that it could be compared between groups at single nodes.

In the "network nodes" tab "network of all ROIs" is selected. A screenshot is attached to this post.


IM