This exploratory study examined whether social learning increases similarity in adolescent siblings’ behavior and neural patterns during risky decision making. Participants included 86 adolescents (43 sibling dyads; younger siblings: M_age = 12.2 years; 22 females; older siblings: M_age = 14.6 years; 20 females) who completed questionnaires, and a decision‐making task during an fMRI scan. Younger siblings became more similar to their older siblings’ risky decision making after observing their older sibling take risks). Younger siblings who reported greater modeling of their older sibling, and less differentiation from them, showed increased neural similarity to their older siblings in the ventromedial prefrontal cortex, and the right anterior insula and ventral striatum, respectively. These findings highlight siblings as salient social agents in how adolescents process risky decision making.

中文翻译：

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你领导，我跟随：在风险决策过程中探索大脑和行为的兄弟姐妹相似性

这项探索性研究检查了社会学习是否会增加青少年兄弟姐妹在风险决策过程中的行为和神经模式的相似性。参与者包括 86 名青少年（43 对兄弟姐妹；弟弟妹妹：M_年龄 = 12.2 岁；22 名女性；哥哥姐姐：M_年龄 = 14.6 年；20 名女性）完成了问卷调查，并在 fMRI 扫描期间完成了一项决策任务。在观察到哥哥姐姐冒险后，弟弟妹妹变得更像哥哥姐姐的冒险决策）。年幼的兄弟姐妹报告说，他们的兄弟姐妹的模型更大，而与他们的分化较少，他们在腹内侧前额叶皮层、右前脑岛和腹侧纹状体中分别显示出与他们的兄弟姐妹的神经相似性增加。这些发现强调兄弟姐妹是青少年如何处理风险决策的重要社会代理。