ent Opinion in Pharmacology, 7, 69- 76; Doya, K. (2008). Modulators of decision making. Nature Neuroscience, 11(4), 410-416; Dreher, J.-C., Kohn, P., Kolachana, B., Weinberger, D. R., & Berman, K. F. (2009). Variation in dopamine genes influences responsivity of the human reward system. Proceedings of the Nation