Dear all, In the DCM example in the SPM5 manual, the B connections are also specified as A connections. (e.g. V1 -> V5). Is this always the case? Has a B connection to be specified as an A connection as well, or can i specify the V1 -> V5 solely as a B, without having to specify it as an A in the first place. Thanks, -- Bjorn Roelstraete Ghent University Department of Data-analysis H. Dunantlaan 1, B-9000 Gent, Belgium Tel: 32-9-2646434 E-mail: [log in to unmask]