中文摘要：

为明确社交网站中的上行社会比较对青少年抑郁的作用机制,本研究构建了一个有调节的中介模型,重点考察了妒忌在二者关系中的中介作用、反刍思维的调节作用及其性别差异。以836名高中生为被试（M=16.34岁,SD=1.06）,采用问卷法对社交网站中的上行社会比较、妒忌、反刍思维以及抑郁进行调查。结果显示：（1）在控制性别、年龄、年级、社交网站好友数量以及平均每天使用社交网站频率、时间后,社交网站上行社会比较对抑郁具有显著的正向预测作用;（2）妒忌能够在社交网站上行社会比较与抑郁的关系中起中介作用,且这种间接效应会受到反刍思维的调节;（3）有调节的中介模型存在性别差异：与男生相比,妒忌的中介效应在女生被试群体中更显著;在男生被试群体中,妒忌的中介作用会受到反刍思维的调节作用的影响,而在女生被试群体中,该调节效应不显著。

英文摘要：

Scholars have started investigating the link between social network site（SNS） use and depression among adolescents, but findings remain inconsistent. In order to find out the reasons, researchers conduct lots of studies, trying to give an interpretation for the relationship and its complex mechanisms from a different perspective. Among many factors influencing adolescents＇ depression, the role of upward social comparison on SNS has increasingly received attention of both practitioners and researchers over the past few years. There is substantial literature documenting that upward social comparison on SNS has an important influence on adolescents＇ depression, but little is known about the mediating and moderating mechanisms underlying this relation. Therefore, based on the social comparison theory of envy and the response styles theory of rumination, the present study constructed a moderated mediation model to examine the effect of upward social comparison on SNS and the underling mechanisms. Specifically, the present study examined whether upward social comparison on SNS would be indirectly related to adolescents＇ depression through the experience of envy during SNS using, and whether this indirect association would be moderated by the adolescents＇ rumination. This integrated model can address questions about both mediation and moderation in one model. Its results would be helpful to answer the issues such as ＂what works for whom＂, and provide valuable information for early identification and prevention that cannot be obtained by separately testing the two questions. A total of 836 high school students（mean age = 16.34 years, SD = 1.06） participated in this study. Adolescents＇ upward social comparison on SNS was measured by the revised upward social comparison questionnaire. Envy was assessed with the SNS envy scale. The short form of ruminative responses scale was used to assess rumination traits. Adolescents＇ depression was assessed with the Center for Epidemiologic Studies Depression Sc