Figure 6. Inter-individual differences in drug effects in model-based credit assignment (MBCA) and in preferential model-based credit assignment (MFCA), averaged across informative and non-informative destinations (aPMFCA).

(A) Scatter plot of the drug effects (levodopa minus placebo; ∆aPMFCA, ∆MBCA). Dashed regression line and Pearson r correlation coefficient (see Appendix 1—figure 10 for an analysis that controls for parameter trade-off). (B) Drug effects in credit assignment (∆CA) based on a median on ∆MBCA. Error bars correspond to SEM reflecting variability between participants. See Appendix 1—figure 11, for a report on inter-individual differences in drug effects related to working memory.