Modelling results.

A) Prior parameters for synchronous and asynchronous stimuli: binding parameter (0 = full binding, infinite = no binding) for the Full Joint Prior model, and probability of separate causes (0 = full binding, 1 = no binding) for the Full BCI model. B) Auditory and C) visual precision parameters of the Reduced Joint Prior and BCI for clear to noisy stimuli (left to right). The images depict the first author. Error bars represent SEM. D) Improvement in test error over baseline (the Maximum likelihood model) for the Reduced and Full Bayesian model implementations. Error bars represent SEM. E) Auditory weight in the Reduced Joint Prior model, plotted by SNR and SOA.