家庭用物体探索のパーソナライズのタイミング:剛性ゲート型ハイブリッドポリシー
When to Personalize Household Object Search: A Rigidity-Gated Hybrid Policy
居住者の特性に応じて物体の配置が変わる家庭環境で、パーソナライズが有効な場合を判断する剛性ゲート型ハイブリッドポリシーを提案し、シミュレーションと人間評価でその有効性を示した。
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著者: Xianyao Li, Yuhai Wang, Hu Xiao, Kaleb Smith, Gilbert Yang Ye, Eric Jing Du
分類: cs.RO
原文アブストラクト
Service robots searching for household objects rely on spatial priors to reduce search cost, yet object locations can vary with resident traits. Collecting longitudinal, trait-specific in-home trajectories is invasive and hard to scale. We study when personalization helps and propose PerSim, a rigidity-gated hybrid policy that combines a trait-conditioned prior with a population-frequency baseline, personalizing only when placement behavior is variable. To scale resident-conditioned dynamics, we employ a human-calibrated simulation pipeline to generate and validate object-placement transitions in diverse home layouts, and train a predictor that injects continuous Big Five vectors to output room-level priors and within-room co-occurrence cues. In a unified human study (N=200), dual-layer validation shows that (i) synthetic transitions are judged behaviorally plausible (mean 3.85/5, p < 1e-6), and (ii) in a blinded A/B comparison, personalization is favored primarily for low-rigidity objects (p=0.005), while the population-frequency baseline remains strong for universally placed items, yielding a decision rule for when to personalize. In an offline objective test, we observe a small but significant improvement on unseen continuous trait vectors over nearest discrete configuration matching (p=0.035), supporting interpolation in five-dimensional trait space. Finally, in a home digital twin we show that PerSim reduces expected search cost by combining room visitation effort with within-room cue checking, demonstrating end-to-end gains beyond isolated prediction metrics.
