To explore the effects of social media use on positive/negative emotions and the mediating mechanism among the middle-aged and older adults,the researchers investigated 662 community residents≥45 years,with The Social Media Use Scale,The Upward and Downward Social Comparison Sub-scale,and the Positive and Negative Affect Schedule respectively.The results showed that Social media use positively predicted positive and negative emotions among the middle-aged and older adults,and upward social comparison and downward social comparison mediated above relationship;Specifically,social media use enhanced one’s positive emotions through increase one’s tendency of upward social comparison;and enhances one’s negative emotions through increase one’s downward social comparison.The current study revealed that social media use has a double-edged sword effect on individual emotions and confirmed the assimilation effect of social comparison on individual emotions among the middle-aged and adults.

为探索中老年人社交媒体使用与正/负向情绪的关系及作用机制，研究者采用社交媒体使用量表、上行和下行社会比较分量表、正/负向情绪量表对662名45岁以上中老年人进行调查。结果发现：中老年人社交媒体使用正向预测了正向情绪和负向情绪，且上行社会比较、下行社会比较中介了上述关系。具体为，中老年人社交媒体使用通过增加上行社会比较提升了正向情绪；通过增加下行社会比较提升了负向情绪。研究表明，中老年人社交媒体使用对个体情绪健康具有双刃剑作用，并支持了社会比较的同化效应。

国家自然科学基金(71774157);; 中国科学院心理研究所行为科学院重点实验室重点项目(Y5CX052003)