title: Neurocognitive development of risk aversion from early childhood to adulthood.
abstract: Human adults tend to avoid risk. In behavioral economic studies, risk aversion is manifest as a preference for sure gains over uncertain gains. However, children tend to be less averse to risk than adults. Given that many of the brain regions supporting decision-making under risk do not reach maturity until late adolescence or beyond it is possible that mature risk-averse behavior may emerge from the development of decision-making circuitry. To explore this hypothesis, we tested 5- to 8-year-old children, 14- to 16-year-old adolescents, and young adults in a risky-decision task during functional magnetic resonance imaging (fMRI) data acquisition. To our knowledge, this is the youngest sample of children in an fMRI decision-making task. We found a number of decision-related brain regions to increase in activation with age during decision-making, including areas associated with contextual memory retrieval and the incorporation of prior outcomes into the current decision-making strategy, e.g., insula, hippocampus, and amygdala. Further, children who were more risk-averse showed increased activation during decision-making in ventromedial prefrontal cortex and ventral striatum. Our findings indicate that the emergence of adult levels of risk aversion co-occurs with the recruitment of regions supporting decision-making under risk, including the integration of prior outcomes into current decision-making behavior. This pattern of results suggests that individual differences in the development of risk aversion may reflect differences in the maturation of these neural processes.
authors.affiliation: Department of Psychology and Neuroscience, Duke University Durham, NC, USA.
authors.forename: David J
authors.initials: DJ
authors.lastname: Paulsen
authors.forename: R McKell
authors.initials: RM
authors.lastname: Carter
authors.forename: Michael L
authors.initials: ML
authors.lastname: Platt
authors.forename: Scott A
authors.initials: SA
authors.lastname: Huettel
authors.forename: Elizabeth M
authors.initials: EM
authors.lastname: Brannon