Fig. 2

Whole-trial analysis. a–d show the four models that could describe the distribution of spike counts on individual dual-sound trials (0–600 or 0–1000 ms after sound onset, see Methods). a Mixture of the Poisson distributions of spike counts for the component single-sound trials, b Intermediate Poisson distribution, with rate between the rates of single-sounds responses, c Outside, Poisson distribution with rate larger or lower than the rates of single-sounds responses, d Single, Poisson distribution with rate equal to one of the two single-sound rates. e–h Four examples of spike count distributions for triplets classified as Mixtures or Intermediates. Red and blue shades indicate distributions of spike counts for single-sounds; black outlines indicate distributions for dual sounds. The triplets in e, f were classified as Mixture with winning probability > 0.95 (e shows the same triplet as Fig. 1e; f shows the same triplet as Fig. 3b). Triplets in g, h were classified as Intermediate with winning probability > 0.95 (g shows the same triplet as Fig. 1f and Fig. 3c; h shows the same triplet as Fig. 3d). i Population results of the whole-trial analysis. Shading indicates the confidence level of the assignment of individual triplets to winning models