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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
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Multimodal Feedback for Handheld Tool Guidance: Combining Wrist-Based Haptics with Augmented Reality.

Yue Yang, Christoph Leuze, Brian Hargreaves

    IEEE Transactions on Visualization and Computer Graphics
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    PubMed
    Summary
    This summary is machine-generated.

    Wrist-worn haptic feedback significantly improves spatial precision and usability in augmented reality (AR) surgical guidance tasks. This multimodal approach enhances tool manipulation confidence and reduces cognitive load for complex procedures.

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    Area of Science:

    • Human-Computer Interaction
    • Augmented Reality
    • Haptics

    Background:

    • Augmented reality (AR) overlays aid surgical tasks but face challenges like visual occlusion and interface ambiguity.
    • Existing AR systems can compromise precision and user confidence in visually complex procedures.

    Purpose of the Study:

    • To investigate vibrotactile wrist feedback for enhancing spatial guidance in optical see-through AR for handheld tool movement.
    • To design and evaluate a multimodal system combining AR visuals with wrist-worn haptic cues.

    Main Methods:

    • A formative study with surgeons identified key maneuvers and haptic cue preferences.
    • A cue identification experiment (N=21) tested vibration pattern recognition under visual load.
    • A guidance task experiment (N=27) compared AR alone, haptics alone, and combined AR-haptics.

    Main Results:

    • Participants accurately recognized vibrotactile cues, with full-actuator states performing better than directional cues.
    • The combined AR and haptics group showed significantly higher spatial precision (5.8 mm) and usability (SUS=88.1).
    • Haptic cues provided reassurance and reduced cognitive effort, despite minor increases in task time.

    Conclusions:

    • Integrating wrist-based haptics into AR systems shows promise for high-precision tasks like surgical guidance.
    • Multimodal interfaces with haptic feedback can improve user confidence and efficiency in tool manipulation.
    • Design implications for effective multimodal interfaces supporting complex manipulation tasks are discussed.