Fast processing of tastes as a signature of aversive stimulus processing. A, The reduced HMM containing only Na and CA state sequences. B, Analysis across the entire sucrose trials dataset: Suc was confused with Na much more often than CA (y-axis) in Pre and Ext, and with CA more often than Na in Post. χ2(2,N = 647) = 138.47, p < 0.0001.