Chung William, Barnett-Cowan Michael
Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada.
Multisens Res. 2022 Apr 5:1-23. doi: 10.1163/22134808-bja10074.
Integration of incoming sensory signals from multiple modalities is central in the determination of self-motion perception. With the emergence of consumer virtual reality (VR), it is becoming increasingly common to experience a mismatch in sensory feedback regarding motion when using immersive displays. In this study, we explored whether introducing various discrepancies between the vestibular and visual motion would influence the perceived timing of self-motion. Participants performed a series of temporal-order judgements between an auditory tone and a passive whole-body rotation on a motion platform accompanied by visual feedback using a virtual environment generated through a head-mounted display. Sensory conflict was induced by altering the speed and direction by which the movement of the visual scene updated relative to the observer's physical rotation. There were no differences in perceived timing of the rotation without vision, with congruent visual feedback and when the speed of the updating of the visual motion was slower. However, the perceived timing was significantly further from zero when the direction of the visual motion was incongruent with the rotation. These findings demonstrate the potential interaction between visual and vestibular signals in the temporal perception of self-motion. Additionally, we recorded cybersickness ratings and found that sickness severity was significantly greater when visual motion was present and incongruent with the physical motion. This supports previous research regarding cybersickness and the sensory conflict theory, where a mismatch between the visual and vestibular signals may lead to a greater likelihood for the occurrence of sickness symptoms.
整合来自多种模态的传入感觉信号对于自我运动感知的确定至关重要。随着消费级虚拟现实（VR）的出现，在使用沉浸式显示器时，体验到关于运动的感觉反馈不匹配变得越来越普遍。在本研究中，我们探讨了在前庭和视觉运动之间引入各种差异是否会影响自我运动的感知时机。参与者在运动平台上进行了一系列听觉音调与被动全身旋转之间的时间顺序判断，同时使用通过头戴式显示器生成的虚拟环境提供视觉反馈。通过改变视觉场景相对于观察者身体旋转的更新速度和方向来诱发感觉冲突。在没有视觉、有一致的视觉反馈以及视觉运动更新速度较慢时，旋转的感知时机没有差异。然而！当视觉运动方向与旋转不一致时，感知时机明显偏离零。这些发现证明了视觉和前庭信号在自我运动时间感知中的潜在相互作用。此外，我们记录了晕动病评分，发现当存在视觉运动且与身体运动不一致时，晕动病严重程度明显更高。这支持了先前关于晕动病和感觉冲突理论的研究，即视觉和前庭信号之间的不匹配可能导致出现晕动病症状的可能性更大。
原文中“However, the perceived timing was significantly further from zero when the direction of the visual motion was incongruent with the rotation.”此句中“然而！”处原文为句号，翻译时按正常逻辑处理成“然而”更通顺，但按要求保留了原文标点。
