摘要目的:探讨孤独感和错失恐惧在大学生社交焦虑与问题性社交网络使用间的链式中介效应。方法:2023年3月至5月，采用交往焦虑量表、孤独感量表、错失恐惧问卷和问题性社交网络使用量表对957名大学生进行横断面调查。使用SPSS 22.0进行描述性统计、相关分析和中介效应检验。结果:社交焦虑、孤独感、错失恐惧和问题性社交网络使用得分分别为(47.09±10.00)分、(44.62±9.20)分、(12.95±4.75)分和(22.63±6.94)分。相关分析结果显示，社交焦虑与孤独感、错失恐惧、问题性社交网络使用均呈正相关( r＝0.50，0.50，0.51，均 P<0.05)，孤独感与错失恐惧、问题性社交网络使用均呈正相关( r＝0.46，0.45；均 P<0.05)，错失恐惧与问题性社交网络使用呈正相关( r＝0.54， P<0.05)。中介效应分析结果显示，社交焦虑对问题性社交网络使用的直接效应显著(效应值为0.23，95% CI＝0.18～0.29)，占总效应的48.94%(0.23/0.47)；孤独感的单独中介作用显著(效应值为0.09，95% CI＝0.05～0.12)，占总间接效应的37.50%(0.09/0.24)；错失恐惧的单独中介作用显著(效应值为0.11，95% CI＝0.08～0.14)，占总间接效应的45.83%(0.11/0.24)；孤独感和错失恐惧的链式中介作用显著(效应值为0.04，95% CI＝0.03～0.06)，占总间接效应的16.67%(0.04/0.24)。 结论:大学生社交焦虑不仅可以直接影响问题性社交网络使用，也可以通过孤独感和错失恐惧对问题性社交网络使用产生间接影响。

abstractsObjective:To explore the chain mediating effect of loneliness and fear of missing out between social anxiety and problematic social network usage in college students.Methods:From March to May 2023, the questionnaire survey was conducted on 957 college students using the interaction anxiousness scale, loneliness scale, fear of missing out scale and problematic social network usage scale, and the descriptive statistical, correlation analysis and mediating effect analysis were performed by the SPSS 22.0 software.Results:The scores of social anxiety, loneliness, fear of missing out and problematic social network usage were (47.09±10.00), (44.62±9.20), (12.95±4.75), and (22.63±6.94), respectively. The results of correlation analysis showed that social anxiety was significantly positively correlated with loneliness, fear of missing out and problematic social network usage ( r=0.50, 0.50, 0.51, all P<0.05). Loneliness was significantly positively correlated with fear of missing out and problematic social network usage( r=0.46, 0.45, both P<0.05).There was a significant positive correlation between fear of missing out and problematic social network usage( r=0.54, P<0.05). The mediating effect analysis showed that social anxiety had a significant direct effect on problematic social network usage (effect value=0.23, 95% CI=0.18~0.29), accounting for 48.94%(0.23/0.47) of the total effect. The separate mediating effect of loneliness (effect value=0.09, 95% CI=0.05~0.12) and fear of missing out(effect value=0.11, 95% CI=0.08~0.14) were significant, and accounted for 37.50%(0.09/0.24) and 45.83%(0.11/0.24) of the total indirect effect respectively. The chain mediating effect value of loneliness and fear of missing out was significant (effect value=0.04, 95% CI=0.03~0.06), accounting for 16.67%(0.04/0.24) of the total indirect effect. Conclusion:Social anxiety can directly affect problematic social network usage of college students and indirectly affect problematic social network usage through loneliness and fear of missing out.