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The ventral striatum (VS) is a critical brain region for reinforcement learning and motivation. Intrinsically motivated subjects performing challenging cognitive tasks engage reinforcement circuitry including VS even in the absence of external feedback or incentives. However, little is known about how such VS responses develop with age, relate to task performance, and are influenced by task difficulty. Here we used fMRI to examine VS activation to correct and incorrect responses during adoi:10.1016/j.neuroimage.2012.03.060 pmid:22484308 pmcid:PMC3358426 fatcat:mr723sel4zacrebq4k3nhwmgve