dear Peter , we are struggling with some questions about DCM. very basic indeed.
we have a design with two sessions and we would like to test between- groups differences on the intrinsic and context-dependent connectivity of our selected model
the question is: can we run two separate dcm for session 1 and 2 and consider session as a factor when we compare the values later on?
or rather better to concatenate them?
if the latter, can we extract one VOI from the concatenated sessions or better to extract two VOIs, one from each session, and later concatenate also the VOIs?
sorry for the trivial problem, but we are having so sparse opinions about that and not being really able to track down the best procedure
with kind regards
Giorgia
p.s. sorry for the multiple posting, but i was not sure the previous message was properly delivered
|