Transphobic bullying is prevalent in schools around the world. The present study examined the bidirectional relationships among transphobic attitudes, perpetration of transphobic bullying, and witnessing transphobic bullying. The study also included the validation of an instrument to measure transphobic bullying and the prevalence rates of transphobic attitudes and behaviors. The sample was composed of 567 adolescents (38.8% girls; aged 12–17; M = 13.96; SD = 1.18). Participants completed measures of transphobic attitudes, perpetration of transphobic bullying and witnessing transphobic bullying at time 1 (T1) and time 2 (T2) during a 1-year interval. Results showed that transphobic attitudes predicted perpetration of transphobic bullying 1 year later, and that perpetration of transphobic bullying predicted witnessing transphobic bullying 1 year later. As expected, boys scored higher on the measures of perpetration of transphobic bullying and transphobic attitudes at both T1 and T2. These results indicate the importance of working to eliminate transphobic attitudes to reduce bullying behavior.

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跨性别欺凌：态度、观察和实施之间的关系

跨性别欺凌在世界各地的学校中都很普遍。本研究调查了跨性别者态度、跨性别者欺凌行为和目击跨性别者欺凌行为之间的双向关系。该研究还包括对测量跨性别欺凌和跨性别态度和行为流行率的工具的验证。样本由 567 名青少年（38.8% 女孩；12-17 岁；M  = 13.96；SD = 1.18）。参与者在 1 年的时间间隔内，在时间 1 (T1) 和时间 2 (T2) 完成了对跨性别者态度、跨性别者欺凌行为和目击跨性别者欺凌行为的测量。结果表明，恐跨态度预测 1 年后会发生跨性别欺凌，而发生跨性别欺凌则预测 1 年后会发生跨性别欺凌。正如预期的那样，男孩在 T1 和 T2 的跨性别欺凌和跨性别态度的测量中得分更高。这些结果表明努力消除恐跨态度以减少欺凌行为的重要性。