Hi Andrew,

I was wondering whether you could assist me in understanding the output from this directed version of NBS?

I am comparing directed connectivity values between two separate groups (the first group being individuals with Alzheimer's, and the second Controls).
The contrast I am using is [1 -1]. Am I right in understanding that any significant result would suggest that there is greater connectivity in individuals with Alzheimer's compared to Controls?


The reason I ask is that the directed script outputs a variable called test_stat_mat within which I assume are the t-statistics. However, in this instance, they are all negative values. My intuition is that the negative test statistic values show that in fact they have decreased connectivity (even though the contrast is [1 -1]).


Am I misinterpreting these results? 

Best regards,
Greg