Peers increase adolescent risk taking by enhancing activity in the brain's reward circuitry

被引:767
|
作者
Chein, Jason [1 ]
Albert, Dustin [1 ]
O'Brien, Lia [1 ]
Uckert, Kaitlyn [1 ]
Steinberg, Laurence [1 ]
机构
[1] Temple Univ, Dept Psychol, Philadelphia, PA 19122 USA
关键词
DECISION-MAKING; SENSATION SEEKING; PREFRONTAL CORTEX; NUCLEUS-ACCUMBENS; CHOICE SELECTION; AGE-DIFFERENCES; BEHAVIOR; NEUROBIOLOGY; NEUROSCIENCE; IMMEDIATE;
D O I
10.1111/j.1467-7687.2010.01035.x
中图分类号
B844 [发展心理学(人类心理学)];
学科分类号
040202 ;
摘要
The presence of peers increases risk taking among adolescents but not adults. We posited that the presence of peers may promote adolescent risk taking by sensitizing brain regions associated with the anticipation of potential rewards. Using fMRI, we measured brain activity in adolescents, young adults, and adults as they made decisions in a simulated driving task. Participants completed one task block while alone, and one block while their performance was observed by peers in an adjacent room. During peer observation blocks, adolescents selectively demonstrated greater activation in reward-related brain regions, including the ventral striatum and orbitofrontal cortex, and activity in these regions predicted subsequent risk taking. Brain areas associated with cognitive control were less strongly recruited by adolescents than adults, but activity in the cognitive control system did not vary with social context. Results suggest that the presence of peers increases adolescent risk taking by heightening sensitivity to the potential reward value of risky decisions.
引用
收藏
页码:F1 / F10
页数:10
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