社交媒体连接的底层逻辑深刻变革着人们的社会交往与互动，一方面，它延伸了用户的社交网络边界和半径，但另一方面，复杂的社交网络也让用户面临更大的角色压力，在压力传导下，用户更容易滋生焦虑、无聊、烦躁、疲劳等怠惰情绪，从而出现潜水、屏蔽和忽略、退出等消极使用行为。由于媒介使用情况的差异，不同年龄群体对社交媒体的消极感知也不同，其中，青年群体最为敏感。

本研究从角色理论出发，运用问卷调查法和深度访谈法，以微信平台为例，聚焦青年群体的社交媒体使用心理与行为，深入考察角色压力、社交媒体倦怠、消极使用行为之间的关系，并考察社交网络异质性在其中的调节作用。

研究通过对 18-35岁的青年（N=582）的问卷调查数据分析发现，角色压力会激发青年用户的社交媒体情绪倦怠（p<0.001），角色压力会加剧青年用户社交媒体消极使用行为（p<0.05），社交媒体情绪倦怠会加重青年用户社交媒体消极使用行为（p<0.001），社交网络异质性可以削弱角色压力对情绪倦怠的影响（p<0.01）。此外，对10名青年深度访谈的结果发现，语境消解和媒介化程度加剧了青年用户角色压力，在角色压力下，用户倾向于选择断连与隐藏式的纾困策略，即信息回避。不过，消极使用与积极使用之间并非固定不变的，而是相互流动的，提升社交媒体开合的自由度可以缓解角色压力对社交媒体消极使用的影响。

基于发现和结论，本研究对微信社交媒体平台的媒介实践提出建议，在分组机制、弱关系边界探索、圈层切换上赋予用户更大的权限，满足多元用户的关系网络半径、亲疏需求，增强用户社交网络异质性，关注青年用户的群体特质和使用方式，减少青年群体因角色压力导致的社交媒体倦怠和消极使用。

The underlying logic of social media connection profoundly changes people's social communication and interaction. For one thing, it extends the boundaries and radius of users' social networks, but for another, complex social networks also make users face greater role stress. Under the pressure transmission, users are more likely to breed laziness such as anxiety, boredom, irritability and fatigue, which probably gives rise to negative behaviors such as diving, shielding and ignoring, and quitting. As a consequence of differences in media usage, the negative perception of social media varies among age groups. It's particularly noteworthy that the youth group is the most sensitive.

Starting from the role theory, this study adopted the questionnaire survey method and in-depth interview method. Taking WeChat platform as an instance, this study fixed its attention on the social media using psychology and behavior of young people, probed deep into the relationship among role pressure, social media burnout, and negative use behavior, and explored the moderating role of social network heterogeneity in it.

As evidently revealed by the analysis of questionnaire data from teenagers aged between 18 and 35 year(N=582) , role stress motivates social media emotional burnout, role stress exacerbates negative social media use, social media emotional burnout exacerbates negative social media use. Besides,social network heterogeneity can weaken the effect of role stress on emotional burnout. Aside from that, as illustrated by the results of in-depth interviews with 10 young people , contextual disintegration and mediatization exacerbate the role stress of young users. What’s more, under the wall of role stress, users tend to choose the relief strategy of disconnection and hidden decoration. Furthermore, the negative use and positive use are not fixed but flowing into each other. In such case, increasing the freedom to open and close social media can mitigate the effects of role stress on social media fatigue.

On the basis of the findings and conclusions, this study makes recommendations for the media practices of WeChat social media platforms: it’s more preferable for WeChat to give users more authority in grouping mechanism, weak relationship boundary exploration, and circle switching to meet the radius of relationship network and affinity needs of multiple users, enhance the heterogeneity of users' social network, fix attention on young users’ group features and using ways, and weaken the social media fatigue brought by young groups' role stress.