用可调控性格的AI团队模拟法庭辩论,发现不同性格组合影响胜率。
Strategic Persuasion with Trait-Conditioned Multi-Agent Systems for Iterative Legal Argumentation

- 用九种可解释性格构建律师AI,分四类角色控制表达风格。
- 异质团队比同质团队胜率高,适度互动深度更稳定,量化与魅力特质最有效。
- 引入强化学习动态调配辩护性格,效果优于人工设计固定组合。
在法律、外交等对抗性领域,语言是策略交互的核心,但多数博弈模型忽略了话语中的说服机制。本文提出战略法庭框架,一个由性格条件化大语言模型组成的多智能体仿真环境,模拟检方与辩方团队进行多轮迭代式法律辩论。每个代理基于九种可解释性格,归入四个原型,实现对修辞风格和策略方向的系统控制。我们在10个合成案件、84种三性格团队配置下,共开展超过7000次模拟庭审,使用DeepSeek-R1和Gemini 2.5 Pro模型。结果表明:具有互补性格的异质团队始终优于同质配置;适度的互动深度带来更稳定的判决结果;某些性格(尤其是量化型与魅力型)对说服成功有显著贡献。我们进一步提出基于强化学习的特质调度器,能根据案件和对方团队动态生成防御性格,发现的策略超越了静态的人工设计组合。这些发现证明语言可作为首要的战略行动空间,为构建具备自适应说服能力的多智能体系统奠定基础。
原文摘要 · Abstract (English)
Strategic interaction in adversarial domains such as law, diplomacy, and negotiation is mediated by language, yet most game-theoretic models abstract away the mechanisms of persuasion that operate through discourse. We present the Strategic Courtroom Framework, a multi-agent simulation environment in which prosecution and defense teams composed of trait-conditioned Large Language Model (LLM) agents engage in iterative, round-based legal argumentation. Agents are instantiated using nine interpretable traits organized into four archetypes, enabling systematic control over rhetorical style and strategic orientation. We evaluate the framework across 10 synthetic legal cases and 84 three-trait team configurations, totaling over 7{,}000 simulated trials using DeepSeek-R1 and Gemini~2.5~Pro. Our results show that heterogeneous teams with complementary traits consistently outperform homogeneous configurations, that moderate interaction depth yields more stable verdicts, and that certain traits (notably quantitative and charismatic) contribute disproportionately to persuasive success. We further introduce a reinforcement-learning-based Trait Orchestrator that dynamically generates defense traits conditioned on the case and opposing team, discovering strategies that outperform static, human-designed trait combinations. Together, these findings demonstrate how language can be treated as a first-class strategic action space and provide a foundation for building autonomous agents capable of adaptive persuasion in multi-agent environments.
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