Attachment in emerging adults is closely intertwined with emotion regulation, stress coping, and social bonding during the transition from childhood to early adulthood. Due to the critical roles of serotonin in these mental functions, this research explored whether the cumulative genetic effects of serotonergic polymorphisms are associated with individual differences and contextual variations in attachment dimensions over time in emerging adults. Study 1 utilized a cross-sectional design in college students (N = 1088, mean age = 22.71 ± 2.86 years). The results showed significant correlations between a higher cumulative genetic score and elevated levels of attachment anxiety and avoidance. Study 2 employed a three-wave longitudinal design in a cohort of freshmen (N = 523, mean age = 19.54 ± 1.86 years at wave 1). The results demonstrated that a higher genetic score was associated with both higher levels and greater variability in attachment dimensions compared to a lower genetic score. These findings suggest that the cumulative genetic effects of serotonergic polymorphisms contribute to individual differences and dynamic processes in attachment dimensions in emerging adults.

在从童年到成年早期的过渡过程中，新兴成年人的依恋与情绪调节、压力应对和社会联系密切相关。由于血清素在这些心理功能中的关键作用，本研究探讨了血清素多态性的累积遗传效应是否与新兴成年人依恋维度随时间的个体差异和背景变化相关。研究 1 采用大学生横断面设计（ N = 1088，平均年龄 = 22.71 ± 2.86 岁）。结果显示，较高的累积遗传评分与依恋焦虑和回避水平升高之间存在显着相关性。研究 2 在一组新生中采用了三波纵向设计（ N = 523，第一波平均年龄 = 19.54 ± 1.86 岁）。结果表明，与较低的遗传得分相比，较高的遗传得分与较高的依恋维度水平和较大的变异性相关。这些发现表明，血清素多态性的累积遗传效应有助于新兴成年人依恋维度的个体差异和动态过程。