Two subjects were excluded because they did not meet our criterion for minimal learning during the experiment: we compared the total amount of monetary rewards that the subjects obtained at the end of the experiment against a Monte-Carlo simulation of 10000 randomly behaving agents and determined the upper 95th percentile of this distribution. Two subjects, whose outcome was not greater that this threshold, were excluded from the analyses. The remaining 18 subjects (8 females) had a mean age of 24 years (± 7.57 sd).
