Abstract: Abstract In recent years, Wechat has gradually become the most popular social tool for Chinese teenagers and young adults. Similar to Facebook addiction in Western countries, excessive use of Wechat can also lead to Wechat addiction. Many studies have shown that addiction to social media harms adolescents’ physical and mental health. Furthermore, social media addiction is a threat to students’ academic performance. Therefore, it is necessary to pay attention to the negative effects of Wechat addiction on adolescents. Previous researchers have suggested that there is a correlation between self-esteem and social media addiction. However, the underlying mechanism deserves further exploration. Previous studies have also shown that self-esteem can predict interpersonal trust, and interpersonal trust is related to addiction behavior. Since we focus on the Internet world, we assume that online interpersonal trust can mediate the relationship between self-esteem and Wechat addiction. Anxiety has also been proved to mediate the relationship between interpersonal trust and addiction behavior. At the same time, we also found that anxiety is related to self-esteem and addiction behavior. Based on these results, we speculated that anxiety may be another mediating variable between self-esteem and Wechat addiction, and then anxiety and Internet interpersonal trust are constituted a serial multiple mediation mechanism between self-esteem and Wechat addiction. Therefore, this study attempts to explore the underlying mechanism between self-esteem and Wechat addiction. 931 college school students were selected as samples, of which 300 were male and 376 were female, with an average age of 19.59. The questionnaires included the Rosenberg Self-esteem Scale (RSES), Wechat Addiction Scale, State-Trait Anxiety Inventory (STAI), Online Interpersonal Trust Scale (OIT). Data were analyzed with SPSS 23 and Mplus7.4, and the bias-corrected percentile bootstrap method was used to analyze the mediating role of online interpersonal trust and anxiety between self-esteem and Wechat addiction of college students. Harman’s one-factor test showed that there is no serious common method bias in this study. The results indicated that: (1) There is a significant negative correlation between self-esteem and state anxiety and WeChat addiction, but no significant correlation with online interpersonal trust. State anxiety was positively correlated with WeChat addiction and online interpersonal trust. Online interpersonal trust was positively correlated with WeChat addiction. (2) Anxiety mediated the relationship between self-esteem and Wechat addiction; (3) As mediating variables, anxiety and online interpersonal trust constitute a serial two-mediator model with self-esteem and Wechat addiction. The results show that self-esteem can predict Wechat addiction directly and negatively, and also influence addiction through state anxiety and interpersonal trust indirectly. Our research has contributed to the description of the mechanism of Wechat addiction by self-esteem. These findings suggest that school teachers and parents should pay more attention to teenagers' self-esteem and interpersonal relationship especially in the network environment, and give correct guidance to avoid anxiety and WeChat addiction caused by low self-esteem.

Key words: Wechat addiction, Self-esteem, Internet interpersonal trust, Anxiety, College students

摘要： 摘要 为探究大学生微信成瘾的原因及其心理机制，采用自尊量表、网络人际信任量表、状态焦虑量表和微信成瘾量表对931名来自三所高校的大学生进行调查。结果表明：（1）自尊与焦虑、微信成瘾显著负相关；焦虑与网络人际信任显著负相关；网络人际信任、焦虑与微信成瘾显著正相关。（2）自尊对微信成瘾有显著的直接预测作用，而且能够通过焦虑、以及焦虑和网络人际信任的链式中介作用间接对微信成瘾产生影响。研究结果对减少大学生微信成瘾具有一定的借鉴意义。

关键词: 微信成瘾, 自尊, 网络人际信任, 焦虑, 大学生