行動品質は学習有用性ではない:ロボット学習のための人間行動モデルにおける目的の不一致
Behavioural Quality Is Not Learning Utility: Objective Mismatch in Human Behaviour Models for Robot Learning
人間行動モデルの生成品質を測る既存指標が下流のロボット強化学習性能を予測できるかを、運転と物体受け渡しの2領域で検証し、両者が一致しない目的のミスマッチを明らかにした論文。
詳しい要約
1. どんなもの?
2. 先行研究と比べてどこがすごい?
3. 技術・手法の肝は?
4. どうやって有効だと検証した?
5. 議論はある?
6. 次に読むべき論文は?
※ AIが要旨から生成した要約です。正確性は原文をご確認ください。
著者: Haoyang Jiang, Dana Kulic, Michael Burke, Pamela Carreno-Medrano
分類: cs.RO
原文アブストラクト
Human behaviour models are increasingly used to provide simulated human interactions for training robots via reinforcement learning (RL). Existing approaches primarily evaluate these models according to how closely their generated behaviours resemble real human data, while their usefulness as training partners is less commonly assessed. This creates a potential objective mismatch: a model that performs well according to behavioural evaluation metrics may not necessarily provide useful training experiences for downstream robot policy learning. Across two human-robot interaction (HRI) domains, highway driving and object handover, we evaluate different types of human behaviour models using common generative-model evaluation metrics. We consider multiple human trajectory representations and compare the resulting evaluations with the downstream performance of RL policies trained using the corresponding models. We find that existing behavioural evaluation metrics do not consistently predict downstream policy performance across domains and trajectory representations, while their evaluations are sensitive to the choice of trajectory representation. We also show that even when the true testing behaviour distribution is known, training against a different distribution may yield better downstream performance than training directly against the true distribution.