Grace C. Huang, Daniel Soto, and Thomas W. Valente are with the Institute for Prevention Research, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles. Kayo Fujimoto is with the Division of Health Promotion and Behavioral Sciences, School of Public Health, University of Texas at Houston.
Am J Public Health. 2014 Aug;104(8):e51-9. doi: 10.2105/AJPH.2014.302038. Epub 2014 Jun 12.
We examined the coevolution of adolescent friendships and peer influences with respect to their risk behaviors and social networking site use.
Investigators of the Social Network Study collected longitudinal data during fall 2010 and spring 2011 from 10th-grade students in 5 Southern California high schools (n = 1434). We used meta-analyses of stochastic actor-based models to estimate changes in friendship ties and risk behaviors and the effects of Facebook and MySpace use.
Significant shifts in adolescent smoking and drinking occurred despite little change in overall prevalence rates. Students with higher levels of alcohol use were more likely to send and receive friendship nominations and become friends with other drinkers. They were also more likely to increase alcohol use if their friends drank more. Adolescents selected friends with similar Facebook and MySpace use habits. Exposure to friends' risky online pictures increased smoking behaviors but had no significant effects on alcohol use.
Our findings support a greater focus on friendship selection mechanisms in school-based alcohol use interventions. Social media platforms may help identify at-risk adolescent groups and foster positive norms about risk behaviors.
我们研究了青少年友谊和同伴影响的共同演变，以及它们与风险行为和社交网站使用之间的关系。
社会网络研究的调查人员在 2010 年秋季和 2011 年春季从南加州 5 所高中的 10 年级学生中收集了纵向数据（n=1434）。我们使用随机主体模型的元分析来估计友谊关系和风险行为的变化，以及 Facebook 和 MySpace 使用的影响。
尽管总体流行率变化不大，但青少年吸烟和饮酒的显著变化仍在发生。饮酒量较高的学生更有可能发送和接收友谊提名，并与其他饮酒者成为朋友。如果他们的朋友喝得更多，他们也更有可能增加饮酒量。青少年会选择具有相似 Facebook 和 MySpace 使用习惯的朋友。接触朋友的危险在线照片会增加吸烟行为，但对饮酒行为没有显著影响。
我们的研究结果支持在基于学校的酒精使用干预中更加关注友谊选择机制。社交媒体平台可能有助于识别高危青少年群体，并培养关于风险行为的积极规范。
