Appendix 1—figure 3. Test for an inverted-U relationship between DA baseline proxy measures (spontaneous eye blink rate (sEBR) & working memory capacity (WMC_PCA)) and the posterior medians of the three choice parameters ($\mathrm{\beta },\mathrm{\phi },\mathrm{\rho }$) of the winning (Bayes-SMEP) model.

Model parameters: $\beta$: softmax parameter; $\phi$: exploration bonus parameter; $\rho$: perseveration bonus parameter.