Interpersonal violence (IV) is a serious concern for adolescents in the United States that has devastating impacts for individuals and communities. Given the increased importance placed on friendships during adolescence, the purpose of the current study was to examine the extent to which IV experiences cluster within youths' friendship networks. Participants were students (N = 1303) in grades 7th to 10th who completed surveys at the beginning and end of an academic year. Results showed that friends' average perpetration (i.e., the percentage of the friends they nominated who perpetrated IV) was strongly associated with likelihood of individual perpetration at baseline but not at the follow-up. For victimization, friends' average report of victimization (i.e., the percentage of the friends they nominated who were victimized) was associated with higher likelihood reporting of victimization (at both baseline and follow-up). Although future research is needed to understand explanatory mechanisms underlying these findings, it is possible that the effectiveness of prevention initiatives may be enhanced by incorporating peer group information.

中文翻译：

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社交网络与青年中的暴力受害和实施：纵向分析

人际暴力 (IV) 是美国青少年严重关切的问题，对个人和社区造成毁灭性影响。鉴于青春期友谊的重要性日益增加，本研究的目的是探讨IV经历在青少年友谊网络中的聚集程度。参与者是 7 至 10 年级的学生（N  = 1303），他们在学年开始和结束时完成了调查。结果显示，朋友的平均犯罪行为（即他们提名的朋友中实施IV行为的百分比）与基线时个人犯罪的可能性密切相关，但在后续情况下则不然。对于受害情况，朋友的平均受害报告（即他们提名的受害朋友的百分比）与较高的受害报告可能性（在基线和后续情况下）相关。尽管需要未来的研究来理解这些发现背后的解释机制，但通过纳入同行群体信息，预防举措的有效性可能会得到提高。