We study the correlations between redirected walking (RDW) rotation gains and patterns in users' posture and gaze data during locomotion in virtual reality (VR). To do this, we conducted a psychophysical experiment to measure users' sensitivity to RDW rotation gains and collect gaze and posture data during the experiment. Using multilevel modeling, we studied how different factors of the VR system and user affected their physiological signals. In particular, we studied the effects of redirection gain, trial duration, trial number (i.e., time spent in VR), and participant gender on postural sway, gaze velocity (a proxy for gaze stability), and saccade and blink rate. Our results showed that, in general, physiological signals were significantly positively correlated with the strength of redirection gain, the duration of trials, and the trial number. Gaze velocity was negatively correlated with trial duration. Additionally, we measured users' sensitivity to rotation gains in well-lit (photopic) and dimly-lit (mesopic) virtual lighting conditions. Results showed that there were no significant differences in RDW detection thresholds between the photopic and mesopic luminance conditions.

翻译：本研究探讨了虚拟现实（VR）环境中重定向行走（RDW）旋转增益与用户运动过程中姿态及注视数据模式之间的相关性。为此，我们开展了一项心理物理学实验，测量用户对RDW旋转增益的敏感性，并在实验过程中采集注视与姿态数据。通过多层建模分析，我们研究了VR系统及用户的不同因素对其生理信号的影响。具体而言，我们分析了重定向增益、试验时长、试验次数（即用户在VR中的累计时长）以及参与者性别对姿态摇摆、注视速度（作为注视稳定性的代理指标）、眼跳频率和眨眼频率的影响。实验结果表明，总体而言，生理信号与重定向增益强度、试验时长及试验次数呈显著正相关，而注视速度与试验时长呈负相关。此外，我们测量了用户在明亮（明视觉）与昏暗（中间视觉）虚拟光照条件下对旋转增益的敏感性。结果显示，在明视觉与中间视觉光照条件下，RDW检测阈值未呈现显著差异。