Engaged bystander interventions are recognized as “promising” programming to reduce sexual violence (SV), yet little is known of the long-term (>12-month) impact of programming on SV and related forms of gender-based violence. Funded by NIH as a prospective cohort study, Life’s Snapshot recruited and followed three waves of high school seniors who had participated in a large high-school cluster-randomized controlled trial to evaluate the effectiveness of the Green Dot bystander intervention. This report provides the study design, recruitment methodology, recruitment and retention rates, survey items, and psychometric properties of measures included in the initial and annual electronic surveys with 24–48 months follow-up.

参与的旁观者干预被认为是减少性暴力 (SV) 的“有希望的”规划，但人们对规划对 SV 和相关形式的基于性别的暴力的长期（>12 个月）影响知之甚少。由美国国立卫生研究院资助的一项前瞻性队列研究，Life's Snapshot招募并跟踪了三批参加过大型高中集群随机对照试验的高中生，以评估绿点旁观者干预的有效性。本报告提供了研究设计、招聘方法、招聘和保留率、调查项目以及包含在初始和年度电子调查中的措施的心理测量特性，并进行了 24-48 个月的随访。