Dear Alfonso,

I have two groups and for one of the group I have clinical data. I would like to first extract and look at the global efficiency of a specific defined network between the two groups ? How can I perform this ? I think I tried something like first: contrasting each group separately and press the graph theory button. And if I want to compare the two group I contrast them like 1 -1 and press the graph theory button. Is this correct ? Any comment is appreciate it here ?

Another important comment which I could not find an answer to is that I would like to correlate the (e.g. global efficiency with the clinical data). The clinical data is a value per subject. How can I look at this ?

Lastly, Does it make sense if I compare (e.g. global efficiency) of two different data (for example resting state vs task data) or (2 different task data). Also does conn compute the graph measurements for task data of gPPI. 

Many thanks 

Aser