When to Act: Calibrated Confidence for Reliable Human Intention Prediction in Assistive Robotics
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Abstract (arXiv)
Assistive devices must determine both what a user intends to do and how reliable that prediction is before providing support. We introduce a safety-critical triggering framework based on calibrated probabilities for multimodal next-action prediction in Activities of Daily Living. Raw model confidence often fails to reflect true correctness, posing a safety risk. Post-hoc calibration aligns predicted confidence with empirical reliability and reduces miscalibration by about an order of magnitude without affecting accuracy. The calibrated confidence drives a simple ACT/HOLD rule that acts only when reliability is high and withholds assistance otherwise. This turns the confidence threshold into a quantitative safety parameter for assisted actions and enables verifiable behavior in an assistive control loop.
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References · 17
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5 more
- 2017Shared Autonomy via Hindsight Optimization for Teleoperation and Teamingcited by 39
- 2019Uncertainty-Aware Anticipation of Activitiescited by 39
- 2024HOIMotion: Forecasting Human Motion During Human-Object Interactions Using Egocentric 3D Object Bounding Boxescited by 16
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