arXiv:2501.06753cs.LGcs.CY2025-01被引 2

提出训练阶段实现过程公平的新方法,揭示其与分配公平的相互影响。

Procedural Fairness and Its Relationship with Distributive Fairness in Machine Learning

  • 在训练中引入新机制保障决策过程公平
  • 过程公平显著提升分配公平性,且受数据偏差影响大
  • 适合关注算法公平性设计的研究者和实践者

机器学习中的公平性近年备受关注,现有研究多聚焦分配公平,对过程公平探索不足。本文提出一种在模型训练阶段实现过程公平的新方法,并在1个合成数据集和6个真实世界数据集上验证其有效性。研究进一步分析过程公平与分配公平的关系:一方面,数据偏差和过程公平均显著影响分配公平;另一方面,优化过程公平可缓解决策过程引入或放大的偏差,确保决策本身公平,同时提升分配公平;而优化分配公平则促使模型决策偏向弱势群体,抵消数据中对优势群体的固有偏好,最终实现分配公平。

原文摘要 · Abstract (English)

Fairness in machine learning (ML) has garnered significant attention in recent years. While existing research has predominantly focused on the distributive fairness of ML models, there has been limited exploration of procedural fairness. This paper proposes a novel method to achieve procedural fairness during the model training phase. The effectiveness of the proposed method is validated through experiments conducted on one synthetic and six real-world datasets. Additionally, this work studies the relationship between procedural fairness and distributive fairness in ML models. On one hand, the impact of dataset bias and the procedural fairness of ML model on its distributive fairness is examined. The results highlight a significant influence of both dataset bias and procedural fairness on distributive fairness. On the other hand, the distinctions between optimizing procedural and distributive fairness metrics are analyzed. Experimental results demonstrate that optimizing procedural fairness metrics mitigates biases introduced or amplified by the decision-making process, thereby ensuring fairness in the decision-making process itself, as well as improving distributive fairness. In contrast, optimizing distributive fairness metrics encourages the ML model's decision-making process to favor disadvantaged groups, counterbalancing the inherent preferences for advantaged groups present in the dataset and ultimately achieving distributive fairness.

公平性机器学习算法公平

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