Fig. 7.

communication and generalised synchrony. This figure uses the same format as Fig. 6; however, here, we have juxtaposed the two birds so that they can hear each other. In this instance, the posterior expectations show identical synchrony at both the first and second hierarchical levels – as shown in the middle and lower panels respectively. Note that the sonogram is continuous over successive one second epochs – being generated alternately by the first and second bird.