为探讨错失恐惧与移动社交媒体使用的关系中的影响和作用机制，基于自我构念和自我扩张的视角下，采用问卷法对834名大学生进行调查。结果表明：（1）错失恐惧能够正向预测移动社交媒体使用；（2）预测效应受到了关系型自我构念的调节作用，相较于关系型自我构念水平低的个体，错失恐惧对移动社交媒体使用的正向预测作用在关系型自我构念水平高的个体中更弱；（3）预测效应也受到独立型自我构念的调节作用，相较于独立型自我构念水平低的个体，错失恐惧对移动社交媒体使用的正向预测作用在独立型自我构念水平高的个体中更弱；（4）两种自我构念的调节作用呈现出累积效应，即高独立型高关系型自我构念个体中错失恐惧对移动社交媒体使用的预测作用显著弱于其他类型的个体；（5）关系型自我构念的调节效应和三项交互效应均可通过手机自我扩张的中介作用对移动社交媒体使用产生影响。本研究结果揭示了自我因素是如何影响并作用于错失恐惧与移动社交媒体使用之间的关系，为理解大学生社交媒体使用提供一定的参考价值。

Previous studies have proven that fear of missing out (FoMO) is a key motivation for users engaging with mobile social media. However, litter is known about the role of individual difference in shaping the relationship between FoMO and the mobile social media use. Therefore, this study aims to explore the impact and mechanism of the relationship between FoMO and the mobile social media use, specifically examining the perspective of the self-construal and self-extension.

A sample of 834 college students were recruited for the study to complete a battery of self-report questionnaires measuring their FoMO, self-extension via smartphone, self-construal and mobile social media use. The results showed that: (1) FoMO can positively predict the mobile social media use. (2) This relationship was moderated by the interdependent self-construal. For individuals with a low level of interdependent self-construal, FoMO had a greater impact on mobile social media use. (3) This relationship was moderated by the independent self-construal self-construal. For individuals with a low level of independent self-construal, FoMO also had a greater impact on mobile social media use. (4) The moderating effects of the two self-construals showed a cumulative effect, that was, the predictive effect of FoMO on mobile social media use among individuals with high independent and high interdependent self-construal was significantly weaker than that for other types of individuals. (5) The moderating effect of the interdependent self-construal and three-way interaction effect were both mediated by self-expansion via smartphone. 

The present study reveals the significant influence of self-related factors on the relationship between FoMO and mobile social media use. The results offer valuable insights for interventions designed to alleviate negatively motivated mobile social media use among college students.