Figure 9.

Derivative of the Bayesian posterior probabilities. A, Averaged derivative of the posterior probability parameter from the Bayesian model in What blocks for the control group, VS lesion group, and the ideal observer (black, blue, and pink, respectively). The dark lines show the means and the shaded region shows ± 1 SEM, computed across sessions. The vertical red dashed line shows the reversal point. Because of the varying reversal point, we normalized the acquisition and reversal phases for each block. After normalization, we used a Gaussian smoothing kernel to smooth the derivatives. B, Same as A, but for Where blocks.