Identifying and Addressing Delusions for Target-Directed Decision Making

Harry Zhao, Tristan Sylvain, Doina Precup, Yoshua Bengio

Keywords: delusions, hallucination, planning, generalization, reinforcement learning

TL;DR: We identify and propose mitigating strategies for an overlooked failure mode of model-based RL agents: delusions

Abstract: Target-directed agents utilize self-generated targets, to guide their behaviors for better generalization. These agents are prone to blindly chasing problematic targets, resulting in worse generalization and safety catastrophes. We show that these behaviors can be results of delusions, stemming from improper designs around training: the agent may naturally come to hold false beliefs about certain targets. We identify delusions via intuitive examples in controlled environments, and investigate their causes and mitigations. With the insights, we demonstrate how we can make agents address delusions preemptively and autonomously. We validate empirically the effectiveness of the proposed strategies in correcting delusional behaviors and improving out-of-distribution generalization.

Primary Area: reinforcement learning

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Submission Number: 1389