The Impact of University Students’ Social Media Dependency on Suicidal Ideation under Information Overload: The Mediating Role of Fear of Missing Out

目的：探讨信息过载背景下大学生社交媒体依赖与自杀意念的关系以及错失恐惧的中介作用，为大学生的心理健康教育提供实证依据。方法：采用社交媒体依赖问卷、错失恐惧量表和自杀意念自评量表对1030名大学生进行调查。使用PROCESS宏程序的Model 4进行中介模型的建立及中介效应检验。结果：(1) 女大学生的社交媒体依赖、错失恐惧和自杀意念均显著高于男大学生；(2) 大学生社交媒体依赖正向预测错失恐惧和自杀意念；(3) 错失恐惧在大学生社交媒体依赖和自杀意念之间起完全中介作用。Purpose: To examine the relationship between social media dependence and suicidal ideation among college students in the context of information overload, and to investigate the mediating role of fear of missing out (FoMO), thereby providing empirical evidence for mental health education interventions targeting college students. Methods: A sample of 1030 college students was surveyed using the Social Media Dependence Questionnaire, the Fear of Missing Out Scale, and the Self-Rating Idea of Suicide Scale. The mediation model was established and tested using Model 4 of the PROCESS macro. Results: (1) Female college students exhibited significantly higher levels of social media dependence, fear of missing out, and suicidal ideation than male students; (2) Social media dependence among college students positively predicted both fear of missing out and suicidal ideation; (3) Fear of missing out fully mediated the relationship between social media dependence and suicidal ideation.