Figure 6. Drug effects for the group-level parameter estimates of the best-fitting Bayesian model.

Shown are posterior distributions of the group-level mean ($M$) of all choice parameters (β, $\phi$, ρ), separately for each drug condition. Each plot shows the median (vertical black line), the 80% central interval (blue (grey) area), and the 95% central interval (black contours); β: random exploration, $\phi$: directed exploration; ρ: perseveration parameter. For drug effects on the standard deviation of the group-level median parameters $\phi ,\beta$ and ρ see Appendix 1—figure 1a. See Appendix 1—figure 1b and c for pairwise drug-related differences of the group-level mean (M) and (c) standard deviation ($\Lambda$) of $\phi$.