提出多价值对齐画布,让AI同时满足多个动态变化的人类价值观。
MAP: Multi-Human-Value Alignment Palette
- 基于用户定义约束的优化框架,实现多价值观协同对齐。
- 实验证明可在不同任务中同时提升无害性、帮助性和积极性。
- 适合需兼顾多元价值观的AI系统设计者与伦理研究者。
确保生成式AI系统与人类价值观对齐至关重要,但面临多价值观及其潜在权衡的挑战。由于人类价值观具有个性化且随时间动态变化的特性,不同族群、行业和用户群体的理想对齐水平各不相同。现有框架难以同时在多个方向(如无害性、帮助性、积极度)上定义并实现价值观对齐。为此,我们提出首个原理性方法——多人类价值观对齐画布(MAP),以结构化、可靠的方式实现多价值观对齐。MAP将对齐问题建模为带有用户定义约束的优化任务,通过原对偶算法高效求解,判断目标是否可达成并给出实现路径。我们从理论上量化了价值观间的权衡、约束敏感性、多值对齐与序列对齐的根本联系,并证明线性加权奖励足以实现多值对齐。大量实验表明,MAP能在各种任务中以原则性方式对齐多价值观,同时保持强实证性能。
原文摘要 · Abstract (English)
Ensuring that generative AI systems align with human values is essential but challenging, especially when considering multiple human values and their potential trade-offs. Since human values can be personalized and dynamically change over time, the desirable levels of value alignment vary across different ethnic groups, industry sectors, and user cohorts. Within existing frameworks, it is hard to define human values and align AI systems accordingly across different directions simultaneously, such as harmlessness, helpfulness, and positiveness. To address this, we develop a novel, first-principle approach called Multi-Human-Value Alignment Palette (MAP), which navigates the alignment across multiple human values in a structured and reliable way. MAP formulates the alignment problem as an optimization task with user-defined constraints, which define human value targets. It can be efficiently solved via a primal-dual approach, which determines whether a user-defined alignment target is achievable and how to achieve it. We conduct a detailed theoretical analysis of MAP by quantifying the trade-offs between values, the sensitivity to constraints, the fundamental connection between multi-value alignment and sequential alignment, and proving that linear weighted rewards are sufficient for multi-value alignment. Extensive experiments demonstrate MAP's ability to align multiple values in a principled manner while delivering strong empirical performance across various tasks.
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