Social media use is almost ubiquitous among adolescents and emerging adults. Although much has been studied about the psychological implications of social media use, there is currently no integrative model in which multiple dimensions of social media are considered. The goal of this theoretical article is to introduce the Multidimensional Model of Social Media Use (MMSMU), which aims to provide a useful framework for researchers and practitioners to study and understand young people’s social media use in relation to their psychological well-being. The model attends to three major dimensions: activities performed on social media, motives for social media use, and communication partners connected through social media. We present empirical evidence showing whether each dimension is associated with better or poorer well-being and identify or propose mechanisms explaining the associations. Before concluding the article, we discuss clinical implications and possible ways to further expand the proposed model.

社交媒体的使用在青少年和新兴成年人中几乎无处不在。尽管已经对社交媒体使用的心理影响进行了很多研究，但目前还没有综合模型来考虑社交媒体的多个维度。这篇理论文章的目的是介绍社交媒体使用的多维模型（MMSMU），旨在为研究人员和从业者提供一个有用的框架，以研究和理解年轻人的社交媒体使用与其心理健康的关系。该模型关注三个主要维度：在社交媒体上进行的活动、社交媒体使用的动机和沟通伙伴通过社交媒体连接。我们提供了经验证据，表明每个维度是否与更好或更差的幸福感相关，并确定或提出解释关联的机制。在结束本文之前，我们讨论了临床意义和进一步扩展所提出模型的可能方法。