title: Developmental continuity in reward-related enhancement of cognitive control.
abstract: Adolescents engage in more risky behavior than children or adults. The most prominent hypothesis for this phenomenon is that brain systems governing reward sensitivity and brain systems governing self-regulation mature at different rates. Those systems governing reward sensitivity mature in advance of those governing self-control. This hypothesis has substantial empirical support, however, the evidence supporting this theory has been exclusively derived from contexts where self-control systems are required to regulate reward sensitivity in order to promote adaptive behavior. In adults, reward promotes a shift to a proactive control strategy and better cognitive control performance. It is unclear whether children and adolescents will respond to reward in the same way. Using fMRI methodology, we explored whether children and adolescents would demonstrate a shift to proactive control in the context of reward. We tested 22 children, 20 adolescents, and 23 adults. In contrast to our hypothesis, children, adolescents, and adults all demonstrated a shift to proactive cognitive control in the context of reward. In light of the results, current neurobiological theories of adolescent behavior need to be refined to reflect that in certain contexts there is continuity in the manner reward and cognitive control systems interact across development.
authors.affiliation: Center for Addictions and Mental Health Addictions Research, 100 Stokes St., Rum 3165, Toronto, Ontario M6J 1H4, Canada. Electronic address: nicolestrang@gmail.com.
authors.forename: Nicole M
authors.initials: NM
authors.lastname: Strang
authors.affiliation: University of Wisconsin - Madison, United States.
authors.forename: Seth D
authors.initials: SD
authors.lastname: Pollak
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000502:physiology; D000328:Adult; D000375:Aging / Q000502:physiology*; D001921:Brain / Q000502:physiology; D001931:Brain Mapping; D002648:Child; D003071:Cognition / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008959:Models, Neurological; D015203:Reproducibility of Results; D012201:Reward; D012309:Risk-Taking
keywords: Adolescent; Affective; Cognitive; Development; fMRI