News consumption on social media has become ubiquitous, yet how different forms of engagement shape psychosocial outcomes remains unclear. To address this gap, we leveraged a large-scale dataset of ~26M posts and ~45M comments on the BlueSky platform, and conducted a quasi-experimental study, matching 81,345 Treated users exposed to News feeds with 83,711 Control users using stratified propensity score analysis. We examined psychosocial wellbeing, in terms of affective, behavioral, and cognitive outcomes. Our findings reveal that news engagement produces systematic trade-offs: increased depression, stress, and anxiety, yet decreased loneliness and increased social interaction on the platform. Regression models reveal that News feed bookmarking is associated with greater psychosocial deterioration compared to commenting or quoting, with magnitude differences exceeding tenfold. These per-engagement effects accumulate with repeated exposure, showing significant psychosocial impacts. Our work extends theories of news effects beyond crisis-centric frameworks by demonstrating that routine consumption creates distinct psychological dynamics depending on engagement type, and bears implications for tools and interventions for mitigating the psychosocial costs of news consumption on social media.

翻译：社交媒体上的新闻消费已变得无处不在，然而不同形式的参与如何影响心理社会结果仍不清楚。为填补这一空白，我们利用BlueSky平台上约2600万条帖子和约4500万条评论的大规模数据集，开展了一项准实验研究，通过分层倾向得分分析将81,345名接触新闻推送的“处理组”用户与83,711名“对照组”用户进行匹配。我们从情感、行为和认知三个维度考察了心理社会福祉。研究发现，新闻参与会产生系统性的权衡：抑郁、压力和焦虑水平增加，但孤独感降低且在平台上的社会互动增加。回归模型显示，与评论或引用相比，新闻推送收藏与更严重的心理社会恶化相关，其影响幅度差异超过十倍。这些单次参与效应随着重复暴露而累积，显示出显著的心理社会影响。本研究通过证明常规新闻消费会因参与类型不同而产生截然不同的心理动态，将新闻效应理论扩展至超越危机中心框架，并对减轻社交媒体新闻消费心理社会代价的工具与干预措施具有启示意义。