Although defending self-efficacy is related to defending behavior in cyberbullying, little is known about the underlying mechanisms of this association. This study explored the relationship between defending self-efficacy and defending behavior. In a China sample, it examined the mediating role of defending intention and the moderating role of empathy in the association between defending self-efficacy and defending behavior. A cross-sectional sample of 672 Chinese adolescents (M_age = 14.86, SD = 1.74) completed a questionnaire, which includes measures of defending self-efficacy, defending intention, empathy, and defending behavior. Results showed that defending self-efficacy was significantly and positively associated with defending behavior. Mediation modeling indicated that defending self-efficacy directly affected defending behavior and could indirectly affect defending behavior through the mediating role of defending intention. In addition, the mediation role of defending intention was moderated by empathy, and as the level of empathy increased, the effect of defending self-efficacy on defending intention became stronger, and the effect of defending intention on defending behavior became stronger. These findings advance our understanding of how and when defending self-efficacy is related to defending behavior in cyberbullying among adolescents. It also sheds some light on preventing and intervening in adolescent cyberbullying from a bystander's perspective.

Keywords: Defending behavior; Defending intention; Defending self-efficacy; Empathy.

© 2025. The Author(s).

尽管自我效能感与网络欺凌中的干预行为有关，但人们对这种关联的内在机制知之甚少。本研究探讨了自我效能感和干预行为之间的关系。在中国的一个样本中，该研究考察了干预意图在自我效能感与干预行为之间起中介作用以及同理心对这一关联的调节作用。

一项横断面调查收集了672名中国青少年的数据（平均年龄 = 14.86岁，标准差 = 1.74），问卷包括测量干预自我效能、干预意图、同理心和干预行为的量表。结果显示，干预自我效能与干预行为之间存在显著且正向的关系。中介模型分析表明，干预自我效能直接作用于干预行为，并可通过干预意图这一中介因素间接影响干预行为。此外，干预意图作为中介的作用受到同理心水平的影响，随着同理心水平的增加，干预自我效能对干预意图的影响增强，而干预意图对干预行为的影响也变得更加显著。

这些发现有助于我们更好地理解青少年在网络欺凌中如何以及何时干预自我效能感与干预行为相关联，并为从旁观者的角度预防和干预青少年网络欺凌提供了一些启示。

关键词：
干预行为；干预意图；干预自我效能；同理心。