arXiv Machine Learning By Xiaotong Wang, Xuan Xie

FairTest: Search-Based Fairness Testing for Multi-Agent Reinforcement Learning Systems

Read the original on arXiv Machine Learning →

FairTest is a search-based testing framework designed to uncover fairness failures in Multi-Agent Reinforcement Learning (MARL) systems. It guides candidate generation using three fitness functions—measuring observed fairness, predicting fairness from abstract states, and assessing policy decision uncertainty—and prioritizes tests based on predicted fairness and uncertainty. Evaluations on three environments and two MARL algorithms show FairTest detects significantly more fairness failures than three baselines, with a 221% increase in failure count and 23% better coverage on average.

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