Model comparison.

(A) Posterior probability and (B) Bayes factors for the three models we compared, showing a substantial evidence in favour of the full Bayesian decision model we developed. (C) Posterior probability of the three models in each subject (n = 31), showing that in most of the subjects the data support the fBD model. Models are identified by the same colors in (A) and (C). nL = no learn model; sB = simple Bayesian model; fBD = full Bayesian decision model.