Dear Dr. McLaren,

I have a couple of questions about the gPPI analysis. I have run the traditional SPM PPI analysis before, so I already have created subject-specific VOIs. I would like to use these for the gPPI analysis:

1) In the ppi_wrapper.m, how can I select subject-specific VOIs instead of specifying one second-level VOI?
2) Is it possible to skip the VOI creation in gPPI?
3) Previously I have created two VOIs (one for each experimental run), and I would like to use both again, but I guess the possibility to put multiple VOIs into the variable 'regionfile' is not meant for this purpose, but only when I would like to use different brain regions as seed regions? So how can I use two VOIs for every subject?

Thank you in advance,

Jolien Francken