Influence of virtual heights and a cognitive task on standing postural steadiness

IF 2.5 2区 工程技术 Q2 ENGINEERING, INDUSTRIAL International Journal of Industrial Ergonomics Pub Date : 2024-01-25 DOI:10.1016/j.ergon.2024.103553
Bi-Ru Jian , Yaw-Huei Hwang , Huey-Wen Liang
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Abstract

Virtual reality can simulate virtual heights and increase postural sway, while adding a cognitive task has a potential stabilization effect on posture stability. Our purpose was to observe the change of postural steadiness in different virtual heights, with or without an added-on cognitive task. Thirty young and healthy participants completed standing tasks in the real world and three virtual heights with or without a concurrent simple reaction time (SRT) task in a virtual environment. Most of the center of pressure parameters significantly increased while standing without an SRT task at virtual heights compared with the real world, but this difference was not observed while standing with an SRT task. The height-dependent effect for postural steadiness was not documented. Perceived distress scores were generally low and increased at exposure to the 12-m height compared to the 0-m height. There was no difference in SRT at the three virtual heights. Our results documented a destabilizing effect of a virtual environment, but were not able to confirm a height-dependent effect. A concurrent SRT task increased steadiness in virtual environment, and might have potentials being used as a training approach to enhance postural steadiness for at-height workers.

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虚拟高度和认知任务对站立姿势稳定性的影响
虚拟现实可以模拟虚拟高度并增加姿势摇摆,而添加认知任务对姿势稳定性有潜在的稳定作用。我们的目的是观察在不同虚拟高度下,添加或不添加认知任务时姿势稳定性的变化。30 名年轻健康的参与者分别在现实世界和三个虚拟高度完成了站立任务,并在虚拟环境中同时完成或未完成简单反应时间(SRT)任务。与真实世界相比,在没有 SRT 任务的虚拟高度站立时,大部分压力中心参数都明显增加,但在有 SRT 任务的站立时却没有观察到这种差异。在姿势稳定性方面,没有记录到与高度相关的影响。感受到的痛苦得分普遍较低,与 0 米高度相比,在 12 米高度时感受到的痛苦得分更高。三种虚拟高度下的 SRT 没有差异。我们的研究结果表明,虚拟环境有破坏稳定性的作用,但无法证实高度依赖效应。同时进行的 SRT 任务可增强虚拟环境中的稳定性,因此有可能被用作一种训练方法,以增强高空作业人员的姿势稳定性。
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来源期刊
International Journal of Industrial Ergonomics
International Journal of Industrial Ergonomics 工程技术-工程:工业
CiteScore
6.40
自引率
12.90%
发文量
110
审稿时长
56 days
期刊介绍: The journal publishes original contributions that add to our understanding of the role of humans in today systems and the interactions thereof with various system components. The journal typically covers the following areas: industrial and occupational ergonomics, design of systems, tools and equipment, human performance measurement and modeling, human productivity, humans in technologically complex systems, and safety. The focus of the articles includes basic theoretical advances, applications, case studies, new methodologies and procedures; and empirical studies.
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