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A Wearable Multi-Modal Bio-Sensing System Towards Real-World Applications.

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    This study introduces a wearable multi-modal bio-sensing system for real-world affective computing research. The system integrates various sensors, enabling new insights into human behavior and cognitive states outside the lab.

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    Area of Science:

    • Affective Computing
    • Human-Computer Interaction
    • Biomedical Engineering

    Background:

    • Multi-modal bio-sensing is valuable in affective computing, autism, and virtual reality.
    • Existing wearable systems lack research-grade, multi-modal capabilities outside lab settings.

    Purpose of the Study:

    • To develop a wearable multi-modal bio-sensing system for real-world data collection.
    • To integrate and validate multiple bio-sensors (PPG, EEG, eye-gaze, motion, GSR) with task modulation.
    • To demonstrate applications in understanding cognitive and behavioral states.

    Main Methods:

    • Developed a wearable system integrating photoplethysmography (PPG), electroencephalography (EEG), eye-gaze, motion capture, and galvanic skin response (GSR) sensors.
    • Implemented motion-noise canceling for PPG and shielded dry EEG sensors.
    • Validated sensor accuracy against research-grade equipment.
    • Conducted experiments using visual search and game-based tasks.

    Main Results:

    • Earlobe PPG module demonstrated effective heart-beat calculation with motion-noise canceling.
    • Shielded dry EEG sensors showed comparable performance to commercial dry EEG.
    • Wearable eye-gaze system accuracy was assessed under head movements.
    • Demonstrated bio-sensing applications in strategy optimization for visual search and predicting game outcomes.

    Conclusions:

    • The developed wearable multi-modal bio-sensing system bridges the gap for real-world affective computing research.
    • The system enables novel investigations into cognitive processes and behavioral strategies.
    • Further research can explore the system's potential in diverse applications and refine its limitations.