[Abstract] Objective: Based on the theory of emotional events, this study explores how the relational mobility, an emotional event, effects college students' emotional responses and affects their phubbing. This study also examines whether their core self-evaluation moderates this process. Methods: A two wave, time-lagged survey was conducted among 467 college students with well-validated scales. Results: ①Relational mobility was significantly related to the predicted phubbing (β=-0.11, t = -2.55, P<0.01); ② Students' negative emotions rather than the positive emotions, mediated the relationship between relational mobility and phubbing (b = -0.06 95% CIs=[-0.10，-0.03]) . ③These effects were moderated by their core self-evaluations. When the core self-evaluation is high, relational mobility has a stronger effect on negative emotions (b=-0.56, t=-6.26, P<0.001). The moderated mediation model test showed that the moderating effect of core self-evaluation on the indirect path of negative emotions is also significant. With a high core self-evaluation, the indirect effect of relational mobility on phubbing through negative emotions is significantly weakened (b=-0.08, 95% CIs=[-0.13-0.05]). Conclusion: The relational mobility of the environment can significantly reduce the negative emotions of students, thereby suppressing phubbing. For groups with higher core self-evaluation, this inhibitory effect stronger.

目的：基于情感事件理论，探讨关系流动性作为一个情感事件，通过引发大学生的情绪反应进而影响其低头行为，以及大学生的核心自我评价对这一过程的调节作用。方法：采用两阶段的问卷法对476名大学生进行问卷调查。结果：①关系流动性显著负向预测低头行为（β = -0.11，t = -2.55，P < 0.01）；②关系流动性通过消极情感对低头行为的间接效应显著（b = -0.06， 95%置信区间= [-0.10， -0.03]），但其通过积极情感对低头行为的间接效应不显著（b = -0.001， 95%置信区间= [-0.003， 0.10]）；③核心自我评价调节关系流动性对消极情感的影响，当核心自我评价较高时，关系流动性对消极情感的抑制作用更加显著（b = -0.56，t = -6.26，P < 0.001）；有调节的中介模型检验表明，核心自我评价对消极情感的间接路径的调节效应显著，在较高核心自我评价下，关系流动性通过消极情感负向影响低头行为的间接效应被显著削弱（b = -0.08， 95%置信区间= [-0.13， -0.05]）。结论：关系流动性能够显著减少大学生的消极情感，进而抑制低头行为。对于核心自我评价较高的群体，这种抑制作用会更强。

重庆市教委科学技术研究项目（编号：KJQN202200473）;; 重庆医科大学关于未来医学青年创新团队支持计划项目（编号：W0008）