Here we attempt to dissociate behavioral preferences for different discount factors to examine the convergence and divergence of neural representations of subjective value in an adult life span sample. We examined neural subjective value representations when monetary rewards must be integrated with one of three discount factors: time delays, physical effort, or probability. **Hypothesis:** There will be common representation of subjective value in the ventral striatum and medial prefrontal cortex. **Population:** Adult life span population (22-83 years old)
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