Online comments significantly influence users' judgments, yet their presentation, often determined by platform algorithms, can introduce biases, such as anchoring effects, which distort reasoning. While existing research emphasizes mitigating individual cognitive biases, the evolution of user judgments during comment engagement remains overlooked. This study investigates how presentation cues impact reasoning and explores interface design strategies to mitigate bias. Through a preliminary experiment (N=18) and a co-design workshop, we identified key challenges users face across a four-stage process and distilled four design requirements: pre-engagement framing, interactive organization, reflective prompts, and synthesis support. Based on these insights, we developed CommSense, an on-the-fly plugin that enhances user engagement with online comments by providing visual overviews and lightweight prompts to guide reasoning. A between-subject evaluation (N=24) demonstrates that CommSense improves bias awareness and reflective thinking, helping users produce more comprehensive, evidence-based rationales while maintaining high usability.

翻译：在线评论显著影响用户的判断，然而其呈现方式（通常由平台算法决定）可能引入偏见（如锚定效应），从而扭曲推理过程。现有研究虽强调减轻个体认知偏见，但用户在参与评论过程中的判断演变仍被忽视。本研究探讨呈现线索如何影响推理，并探索缓解偏见的界面设计策略。通过初步实验（N=18）和协同设计工作坊，我们识别了用户在四阶段流程中面临的关键挑战，并提炼出四项设计需求：参与前框架设定、交互式组织、反思性提示与综合支持。基于这些洞见，我们开发了CommSense——一款即时插件，通过提供可视化概览和轻量级提示来引导推理，从而增强用户对在线评论的参与度。一项组间评估（N=24）表明，CommSense提升了偏见意识与反思性思维，帮助用户生成更全面、基于证据的理性依据，同时保持了高可用性。