Jessica I. Määttä

This study shows dopamine enhances both reinforcement learning and working memory, reduces effort costs, and highlights the need to account for its effects on working memory when studying reinforcement learning.

The paper investigates whether simple trait measures correlate with striatal dopamine synthesis capacity and finds no significant correlations.

The paper links striatal dopamine synthesis capacity to smartphone social activity using PET scans and behavioral data from healthy adults.

The study replicates a previous finding that reward effects on cognitive control depend on dopamine synthesis capacity but fails to find a correlation in a larger sample using a different radiotracer.

This study shows methylphenidate increases preference for mental labor over leisure, especially in individuals with higher baseline striatal dopamine.

The paper shows methylphenidate enhances cognitive effort by altering the benefit-to-cost ratio of cognitive work through striatal dopamine signaling.