AI 中文总结
本文提出议程民主化指数与社会信息健康模型，设计领域选择性桥接算法，经智能体模拟验证，该算法能在集体决策相关领域改善信息共享，同时维持爱好与生活方式领域用户体验，将回音室辩论转化为工程设计问题。
AI 中文摘要
回音室是人类认知系统的必然产物，该系统经进化设计，会优先处理小群体规模下高相关性信息，同时算法以优化参与度为唯一目标。鉴于这些认知约束，传统规范式批评回音室并要求个体改变行为的方案可行性极低。本文构建了议程民主化指数（ADI），该指数通过准入门槛、粒度、交互性和反馈解决四个变量量化议程设置权力的去中心化程度；还构建了社会信息健康（SIH）模型，将ADI与桥接机制强度相结合。基于此模型，本文提出领域选择性桥接，该机制将参与度和桥接同时纳入算法评分函数，根据变异性（V）和集体范围（S）为每个信息领域优化桥接权重。一项基于智能体的模拟实验比较了三种算法设计：无桥接、均匀桥接和领域选择性桥接，结果显示，在联合效率指标（SIH用户满意度）上，领域选择性桥接的表现显著优于均匀桥接；该指标的绝对值受模型1近乎为零的用户满意度影响，但方向和排名具有稳健性，其在与集体决策相关的领域改善信息共享的同时，维持了爱好和生活方式领域的用户体验。本文将回音室辩论从是否消除回音室的规范对立，重新定义为一个工程设计问题，即应在哪些信息领域、以何种程度、通过何种算法设计来实施桥接。
英文摘要
Echo chambers are an inevitable consequence of the human cognitive system being evolutionarily designed to prioritize processing of high-relevance information at the small-group scale, combined with algorithms that optimize engagement as their sole objective. Conventional prescriptions that normatively criticize echo chambers and demand individual behavioral change have low feasibility given these cognitive constraints. This paper constructs an Agenda Democratization Index (ADI) that quantities the decentralization of agenda-setting power using four variables barrier to entry, granularity, interactivity, and feedback resolution and a SocialInformation Health (SIH) model that integrates ADI with the strength of bridging mechanisms. Based on this model, we propose domain-selective bridging, which incorporates not only engagement but also bridging into algorithmic scoring functions, optimizing the bridging weight for each information domain based on variability (V ) and collective scope (S). An agent-based simulation comparing three algorithm designs no bridging, uniform bridging, and domain-selective bridging demonstrated that domain-selective bridging substantially outperforms uniform bridging on a joint efficiency measure (SIH user satisfaction) by a factor whose absolute value is sensitive to Model 1's near-zero user satisfaction, but whose direction and dominance ranking are robust improving information sharing in domains relevant to collective decision-making while maintaining user experience in hobby and lifestyle domains. This paper reframes the echo chamber debate from a normative opposition over whether to eliminate echo chambers to an engineer-ing design problem of in which information domains, to what degree, and through what algorithm design should bridging be implemented.
Comments34 pages, 6 figures
