Variability and reliability of the afferent neural populations. Time-varying spike variability of sensory feedback and cerebellar output neurons (positive and negative groups for each) in the prelearning (A) and postlearning (B) conditions. The corresponding reliability time profiles are reported on the right. These reliability values are then used as weights for the “continuous” Bayesian integration. Finally, the mean and standard deviation of variability and reliability are computed (C) across a lengthy task duration.