スマート車いすの人間ロボット相互作用における動作変動性とユーザー体験
Locomotion Variability and User Experience in Smart Wheelchair Human-Robot Interaction
共有制御における支援戦略が動作変動性とユーザー体験に与える影響を調査し、自然な動作変動を保つ自律支援型制御が従来の変動抑制型支援よりも主体感と有用性を高めることを示した。
詳しい要約
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著者: Sean Kille, Adina M. Panchea, Balint Varga, Sören Hohmann
分類: cs.RO, cs.HC, eess.SY
原文アブストラクト
Human movement is inherently variable, with variability structured according to task relevance: movements are typically more consistent at task-critical points and more flexible elsewhere. In human-robot interaction (HRI), however, model-based assistance strategies commonly assume deterministic human behavior and suppress such variability, potentially altering how interactions are experienced and lowering sense of agency. While movement variability is increasingly recognized as functionally meaningful, its deliberate preservation in assisted interaction, and its consequences for user experience, remain underexplored. In this paper, we empirically investigate how different assistance strategies shape human movement variability, task performance, and subjective interaction experience in a shared control setting. We introduce an autonomy-supportive shared control strategy that preserves users' natural movement structure. This approach is evaluated in a user study in which participants push an intelligent powered wheelchair under three conditions: no assistance, conventional variability-reducing assistance, and variability-preserving assistance. While task-relevant performance remained comparable across assisted modes, preserving natural movement variability led to more favorable interaction experiences. In particular, participants reported significantly higher perceived agency compared to conventional assistance and highest perceived usefulness. These findings suggest that variability-aware assistance can support both performance and user autonomy in physical human-robot collaboration. More broadly, the results highlight the importance of designing assistive robotic systems that respect the embodied structure of human movement rather than treating variability as noise to be neglected or eliminated.