HCC: Small: Determining the Effects of Latency in Virtual Reality Physical Rehabilitation

HCC：小：确定虚拟现实物理康复中延迟的影响

• 批准号: 1218283
• 负责人: John Quarles
• 金额: $ 47.28万
• 依托单位: University of Texas at San Antonio
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1218283&HistoricalAwards=false
• 关键词: HCC; Small; Determining; Effects; Latency

Although the effect of latency (i.e., how quickly a system can respond to user input) on users has been one of the fundamental research areas in virtual reality (VR) for many years, latency's effect on persons with physical disabilities is still unknown. The PI's objective in this project is to acquire a better understanding of how latency of visual feedback in VR can impact interaction performance, perception, and subjective experience for users with reaction time and reflex deficits (e.g., due to neurological, vestibular, balance issues), and to investigate how this ultimately impacts the effectiveness of VR-based rehabilitation. The PI's central hypothesis, based on preliminary data, is that latency will be less perceivable but will have a more significant impact on interaction performance for persons with disabilities as compared to healthy persons. To test this hypothesis, the PI will focus on the main set of applications typically used in VR rehabilitation: games, exercise, and accessibility. He will explore, for members of the target community, latency's impact in VR rehabilitation games, on the effectiveness of visual feedback during rehabilitation exercises in virtual environments (VE), and on accessibility in a VE. Through a series of empirical studies, the PI will determine latency thresholds in VR with respect to interaction performance, physiological response, perception, and subjective impressions. Broader Impacts: Project outcomes will afford a deeper understanding of the effectiveness of VR as a medium for rehabilitation. If the PI's hypothesis is confirmed, the potentially negative implications for the efficacy of VR-based rehabilitation may disrupt accepted theories and revolutionize design guidelines for this type of rehabilitation. Alternatively, this research may inspire other researchers to develop approaches to combat latency in VR specifically for disabled persons, which will also produce further vertical advancement in the field. More generally, this research will provide a critical step towards the grand challenge of universal usability in VR.

虽然延迟（即系统对用户输入的响应速度有多快）对用户的影响多年来一直是虚拟现实（VR）的基础研究领域之一，但延迟对身体残疾人士的影响仍然未知。PI在这个项目中的目标是更好地了解VR中视觉反馈的延迟如何影响反应时间和反射缺陷（例如，由于神经、前庭、平衡问题）的用户的交互性能、感知和主观体验，并研究这最终如何影响基于VR的康复的有效性。基于初步数据，PI的中心假设是，与健康人相比，延迟将不易察觉，但对互动表现的影响更大。为了验证这一假设，PI将重点关注VR康复中通常使用的主要应用程序：游戏、锻炼和可访问性。他将为目标社区的成员探索延迟在VR康复游戏中的影响，在虚拟环境（VE）中康复练习期间视觉反馈的有效性，以及VE中的可访问性。通过一系列实证研究，PI将根据交互性能、生理反应、感知和主观印象确定VR中的延迟阈值。更广泛的影响：项目结果将使人们更深入地了解虚拟现实作为康复媒介的有效性。如果PI的假设得到证实，那么基于vr的康复效果的潜在负面影响可能会破坏公认的理论，并彻底改变这类康复的设计指南。或者，这项研究可能会激励其他研究人员开发出专门针对残疾人的VR延迟的方法，这也将在该领域产生进一步的垂直发展。更一般地说，这项研究将为VR普遍可用性的巨大挑战提供关键的一步。