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Dear DCM experts I have a couple of questions on how to use the post hoc BMS. 1. We have a group study, in which each individual has 4 sessions, and therefore 4 DCMs - (all with the same structure: fully connected), one for each session. What would be the correct way to use the post_hoc comparison? Should this be done in 2 steps: one optimization among all sessions within individual, and then taking the DCM_opt from each individual into a second optimization step across individuals? 2. Assuming that the optimized model can include a bilinear effect (B) for which the intrinsic connection (A) was reduced - what would be the interpretation of such a case. I would appreciate your help!! Tali Bitan University of Haifa