标题： 跨子版块行为作为协调影响的开源指标：r/Sino 与 r/China 的案例研究 显示英文标题

标题： Cross-Subreddit Behavior as Open-Source Indicators of Coordinated Influence: A Case Study of r/Sino & r/China

摘要： 这项研究调查了在同时参与 r/Sino 和 r/China 这两个意识形态分歧的 Reddit 社区的用户中，协调影响活动的潜在指标。 对双子版块用户的帖子和评论进行主题建模和情感分析，以构建用户-主题情感矩阵。 将个体情感模式与从更广泛的 r/Sino 和 r/China 人群得出的全局主题基线进行比较。 使用完整的用户活动历史和元数据进行行为分析，包括词汇多样性、语言一致性、账户年龄、发帖频率和声望分布等指标。 识别出表现出多种行为异常的用户，并在其子版块共同参与网络中进行检查，以评估结构重叠情况。 结合语言和行为分析，能够识别出与不真实或战略性结构化参与一致的模式。 这些发现展示了在有争议的信息环境中，整合内容和活动信号在在线影响行为分析中的实用性。 显示英文摘要

摘要： This study investigates potential indicators of coordinated influence activity among users participating in both r/Sino and r/China, two ideologically divergent Reddit communities focused on Chinese political discourse. Topic modeling and sentiment analysis are applied to all posts and comments authored by dual-subreddit users to construct a user-topic sentiment matrix. Individual sentiment patterns are compared to global topic baselines derived from the broader r/Sino and r/China populations. Behavioral profiling is performed using full user activity histories and metadata, incorporating measures such as lexical diversity, language consistency, account age, posting frequency, and karma distribution. Users exhibiting multiple behavioral anomalies are identified and examined within a subreddit co-participation network to assess structural overlap. The combined linguistic and behavioral analysis enables the identification of patterns consistent with inauthentic or strategically structured participation. These findings demonstrate the utility of integrating content and activity-based signals in the analysis of online influence behavior within contested information environments.