Abstract：
The coevolution of bullying and friendship networks and the moderating effects of classroom bullying popularity norms were examined in a sample of 965 students (52.1% boys) in 22 fourth- and fifth-grade classes. Longitudinal social network analysis showed that children were more likely to bully their friends\' victims (bully influence effect) and to be bullied by their friends\' bullies (victim influence effect); two children bullying the same child were likely to be friends (bully selection effect), and two victims bullied by the same child were likely to be friends (victim selection effect). Bullying popularity norms served as moderators, and the bully selection effect was significant weaker in the context of low bullying popularity norms. This study adds understanding of bullying as a group process and provides implications for preventing school bullying.
摘要：
在22个四年级和五年级的965名学生（52.1％的男孩）的样本中，研究了欺凌和友谊网络的共同进化以及课堂欺凌流行度规范的调节作用。纵向社会网络分析显示，儿童更容易欺负自己的朋友\'受害者（欺负影响效应）和被他们的朋友\'欺负（受害者影响效应）；两个孩子欺负同一个孩子很可能是朋友（欺负选择效应），被同一个孩子欺负的两个受害者很可能是朋友(受害者选择效应)。欺凌的人气规范作为主持人，在低欺凌流行度规范的背景下，欺凌选择效应显著较弱。这项研究增加了对欺凌作为集体过程的理解，并为预防学校欺凌提供了启示。
