Longitudinal link between trait motivation and risk-taking behaviors via neural risk processing.
Longitudinal link between trait motivation and risk-taking behaviors via neural risk processing.
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通过神经风险处理，特质动机和冒险行为之间的纵向联系。
DOI：
10.1016/j.dcn.2019.100725
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发表时间：
2019
影响因子：
4.7
通讯作者：
Deater-Deckard,Kirby
中科院分区：
文献类型：
--
作者：
Li,Mengjiao;Lauharatanahirun,Nina;Steinberg,Laurence;King-Casas,Brooks;Kim-Spoon,Jungmeen;Deater-Deckard,Kirby
先前的研究强调了动机系统在风险决策中的重要性，但动机的个体差异可能影响青少年冒险行为的机制仍有待确定。基于发展神经科学的文献，说明风险处理的重要性，在解释个体差异的价值为基础的决策，我们研究了风险处理的特质动机和青少年的冒险行为之间的关联的潜在中介。样本由167名青少年（47%为女性）组成，每年评估一次，为期3年（时间1时年龄为13-14岁）。使用青少年自我报告来衡量接近和回避动机。根据青少年在修改后的经济彩票选择任务中的决定，估计风险偏好，并通过双侧岛叶皮层对所选选项的血氧水平依赖性反应来测量神经风险处理。本研究采用基于实验室的危险性决策方法，以交通信号灯为任务，对青少年的冒险行为进行了评估。纵向中介分析显示，一个显着的间接影响的方法动机，这样，更高的动机与增加冒险行为通过减少在风险处理过程中的双边岛叶皮层的神经激活。研究结果说明了一个神经通路，通过这种方法的动机转化为风险承担发展的脆弱性。
Prior research has emphasized the importance of the motivational system in risky decision-making, yet the mechanisms through which individual differences in motivation may influence adolescents’ risk-taking behaviors remain to be determined. Based on developmental neuroscience literature illustrating the importance of risk processing in explaining individual differences in value-based decision making, we examined risk processing as a potential mediator of the association between trait motivations and adolescents’ risk-taking behaviors. The sample consisted of 167 adolescents (47% females) annually assessed for three years (13–14 years of age at Time 1). Approach and avoidance motivations were measured using adolescent self-report. Risk preference was estimated based on adolescents’ decisions during a modified economic lottery choice task with neural risk processing being measured by blood-oxygen-level-dependent responses in the bilateral insular cortex for chosen options. Adolescents’ risk-taking behaviors were assessed by laboratory-based risky decision making using the Stoplight task. Longitudinal mediation analyses revealed a significant indirect effect of approach motivation, such that higher motivation was correlated with increases in risk-taking behaviors via decreases in neural activation in the bilateral insular cortex during risk processing. The findings illustrate a neural pathway through which approach motivation is translated into the vulnerability to risk taking development.
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