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Sensitivity to Redirected Walking Considering Gaze, Posture, and Luminance.

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    Area of Science:

    • Human-Computer Interaction
    • Virtual Reality
    • Biomechanics

    Background:

    • Redirected walking (RDW) is a technique to extend virtual reality (VR) experiences within limited physical spaces.
    • Understanding the physiological responses to RDW is crucial for designing comfortable and immersive VR systems.
    • User posture and gaze provide key indicators of physiological responses during locomotion.

    Purpose of the Study:

    • To investigate the correlations between redirected walking (RDW) rotation gains and users' posture and gaze data.
    • To determine how factors like redirection gain, trial duration, and user characteristics influence physiological signals during VR locomotion.
    • To assess the impact of virtual lighting conditions on RDW sensitivity.

    Main Methods:

    • Conducted a psychophysical experiment measuring user sensitivity to RDW rotation gains.
    • Collected detailed posture and gaze data during virtual reality locomotion.
    • Employed multilevel modeling to analyze the effects of RDW gain, trial duration, trial number, and participant gender on physiological signals (postural sway, gaze velocity, saccade/blink rate).
    • Compared RDW detection thresholds under photopic (well-lit) and mesopic (dimly-lit) virtual conditions.

    Main Results:

    • Physiological signals generally showed a significant positive correlation with redirection gain strength, trial duration, and trial number.
    • Gaze velocity exhibited a negative correlation with trial duration.
    • No significant differences in RDW detection thresholds were found between photopic and mesopic lighting conditions.

    Conclusions:

    • User physiological responses during VR locomotion are significantly influenced by RDW parameters and time spent in VR.
    • RDW gain and duration are key factors affecting postural sway and gaze patterns.
    • Virtual lighting conditions do not appear to significantly alter the detection of RDW rotation gains.