Explainable Multi-Agent Reinforcement Learning for Temporal Queries
Explainable Multi-Agent Reinforcement Learning for Temporal Queries
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DOI：
10.48550/arxiv.2305.10378
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发表时间：
2023-05
期刊：
影响因子：
--
通讯作者：
Kayla Boggess;Sarit Kraus;Lu Feng
中科院分区：
文献类型：
--
作者：
Kayla Boggess;Sarit Kraus;Lu Feng
As multi-agent reinforcement learning (MARL) systems are increasingly deployed throughout society, it is imperative yet challenging for users to understand the emergent behaviors of MARL agents in complex environments. This work presents an approach for generating policy-level contrastive explanations for MARL to answer a temporal user query, which specifies a sequence of tasks completed by agents with possible cooperation. The proposed approach encodes the temporal query as a PCTL* logic formula and checks if the query is feasible under a given MARL policy via probabilistic model checking. Such explanations can help reconcile discrepancies between the actual and anticipated multi-agent behaviors. The proposed approach also generates correct and complete explanations to pinpoint reasons that make a user query infeasible. We have successfully applied the proposed approach to four benchmark MARL domains (up to 9 agents in one domain). Moreover, the results of a user study show that the generated explanations significantly improve user performance and satisfaction.
