(A) and (B) The bars represent, for each model, the final optimal decision value estimates (the value of the correct minus the value of the incorrect option). (C) and (D): The bars represent, for each model, the final option value estimates. . G75 and G25: options associated with 75% and 25% percent of winning 0.5€, respectively; L75 and L25: options associated with 75% and 25% percent of losing 0.5€, respectively. EV: absolute expected value (Probability(outcome) * Magnitude(outcome)) in a single trial. The values +37.5¢ and −37.5¢ correspond G75 and the L75 options, respectively. The estimates are generated from individual history of choices and outcomes and subject-specific free parameters. *P<0.05 one sample t-test; ns: not significant (N=28). Error bars represent s.e.m.