【摘要】 探讨网络欺凌情境下大学生感知严重性对旁观者助人意愿的影响及其心理机制.设置虚拟网络欺凌情景，采用感知严重性问卷、旁观者助人意愿问卷、感知责任问卷、防御自我效能感问卷对1 022名大学生进行调查.结果显示：1)感知严重性能够显著正向预测旁观者助人意愿；2)感知责任在感知严重性与旁观者助人意愿之间起部分中介作用；3)防御自我效能感在感知严重性与感知责任之间起调节作用，当防御自我效能感较高时，感知严重性对感知责任的预测作用更强.研究认为，在网络欺凌情境下，旁观者感知严重性不仅直接影响旁观者助人意愿，而且通过感知责任间接影响旁观者助人意愿，防御自我效能感调节了中介效应的前半段路径.更多还原

【Abstract】 This study explored the impact of college students’ perceived severity on bystander helping willingness in cyberbullying situations and its underlying psychological mechanisms. A simulated cyberbullying scenario was set up, and 1 022 college students were surveyed using the Perceived Severity Scale, the Bystander Helping Willingness Scale, the Perceived Responsibility Scale, and the Defensive Self-efficacy Scale. The results showed that: 1) Perceived severity could significantly and positively predict bystander helping willingness. 2) Perceived responsibility played a partial mediating role between perceived severity and bystander helping willingness. 3) Defensive self-efficacy moderated the relationship between perceived severity and perceived responsibility. Specifically, when defensive self-efficacy was higher, the predictive effect of perceived severity on perceived responsibility was stronger. The research concludes that in cyberbullying situations, bystanders’ perceived severity not only directly affects their helping willingness but also indirectly influences it through perceived responsibility. Defensive self-efficacy moderates the first half of this mediating pathway.更多还原