Hi,
I'm running into a weird problem with a basic seed-to-voxel connectivity analysis. I'm using a seed in the PCC. For most of the runs and subjects I see the expected effect: the PCC seed activity correlates to activity in DMN regions. What's strange is that, for some subjects on some runs, I am seeing that the PCC seed is ANTIcorrelated to all of the regions of the DMN that I would expect it to be correlated with. I've attached an image showing an example of this strange effect from one run. Is it possible I am reading the color bar wrong? Any ideas what's going on here?
Thanks so much!
Michael