Intelligence and Extraversion in the neural evaluation of delayed rewards |
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| Institution: | 1. Department of Pediatrics, University at Buffalo, Buffalo, NY 14221, United States;2. USDA-ARS-NPA Grand Forks Human Nutrition Research Center, Grand Forks, ND, United States;1. Neuropsychology and Applied Cognitive Neuroscience Lab, Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China;2. University of Chinese Academy of Sciences, Beijing, China;3. Department of Psychological and Brain Sciences, University of Massachusetts Amherst, Amherst, MA, USA;4. Information Center, National Institute of Education Sciences, Beijing, China;5. Department of Youth Work, China Youth University for Political Sciences, Beijing, China;6. Menzies Health Institute Queensland and School of Applied Psychology, Griffith University, Gold Coast, Australia |
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| Abstract: | Temporal discounting (TD), the preference for earlier, smaller rewards over delayed, larger rewards, is a pervasive phenomenon that covaries with Big Five personality traits and Intelligence (IQ). This study provides novel insight by identifying correlates for IQ and Extraversion in the neural representation of TD preferences. An intertemporal choice task was employed, where offers were sequentially presented, distinguishing between one evaluation phase (first offer is presented) and one comparison phase (second offer is presented and values are compared). IQ correlated with responses of caudate nucleus to the subjective values of the offers, suggesting a role of cognitive abilities in modulating reward responses. Extraversion correlated with the strength of functional connectivity of a reward evaluation network centered on ventromedial prefrontal cortex. |
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| Keywords: | Intelligence Extraversion Temporal discounting Decision preference Functional connectivity Choice Evaluation network Caudate nucleus VMPFC |
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