Fig. 3.

The log-evidence for models tested from three different generative architectures. These are the results of a full test over all possible two-source DCM models, comprising 256 in total. Red bars and arrow indicate the model with the greatest log evidence. In all three cases this corresponds to the correct generative model (a) Generative model 1 comprising forward connections from the first to the second source, (b) Generative model 2 comprising forward connections from the second to the first source and (c) Generative model 3 comprising reciprocal forward connections.