Fig. 8.

(A) Simulated (thick lines) and experimental (thin black lines) psychometric functions obtained and measured for ferret F2, for the Method of Limits. Thick central lines illustrate the median simulated psychometric functions and outer lines define 95% confidence intervals with (grey line) and without (dashed line) trial-to-trial dependencies in the simulations. (B) Effect of trial dependencies on example model psychometric functions for similar variability of internal representation to the data (internal s.d. = 10), and less (s.d. = 5). Simulated trial shift is 5 dB for the previous trial only.