Collective behaviours are influenced by the behavioural composition of the group. For example, a collective behaviour may emerge from the average behaviour of the group's constituents, or be driven by a few key individuals that catalyse the behaviour of others in the group. When ant colonies collectively relocate to a new nest site, there is an inherent trade-off between the speed and accuracy ...

The present work is concerned with the processing of spectral inforrnation by stochastic coding, at the output of the cochlea. We study the collective behaviour of a !arge number of cells based on a measure of the correlation of sequences of spikes between neighbour units. Our first results show that we can obtain significant discrimination of spectra1 components of vowels without any kind of c...