Methods for Measurement and Evaluation of Next Generation Media Technology Effects on Workers' Physiological and Psychological Load

在2002财政年度，第一个关于VDT工作中视觉和心理生理紧张的研究进行了，这需要基于大屏幕（100英寸）上常见信息呈现的认知功能。本研究于2003财政年度以普通VDT工作为对照组，采用单目头戴式显示器（HMD）对VDT工作中视觉和心理生理应变的发生情况进行了比较。所使用的指标是考虑到VDT工作特点的绩效指标；主观心理负荷测量量表；压力和觉醒情绪检查表；视觉功能；自主神经系统活动和大脑活动。结果表明，在VDT工作中，无论是使用大屏幕还是单目头戴式显示器，视觉功能的负荷都很大。同时，通过观察自主神经功能的波动等来探讨心理生理应变的表达，但在使用大屏幕的VDT工作中没有观察到明显的负荷迹象。然而，当使用单眼HMD时，结果表明心血管自主神经活动和大脑活动引起明显波动。此外，对于两种工作，主观疲劳感明显增加。在2004财政年度，研究了这些实验结果与各种指标之间的相互关系，并制定了与使用工业界计划引入的文本显示大屏幕VDT工作和使用单目HMD工作有关的人体工程学检查点。与此同时，通过对文献的研究，增加了正常VDT工作所需的人体工程学清单，使该清单可以在IT工作环境中普遍使用。其目的是检查对健康的影响，并制定改善工作条件/环境的指标。

In fiscal 2002, the first study was carried out on the onset of visual and psycho-physiological strain in VDT work, which demands cognitive functions based on common information presentation on a large screen (100 inch).Using ordinary VDT work as the control group, a comparison was done in fiscal 2003 of the onset of visual and psycho-physiological strain in VDT work using a monocular head-mounted display (HMD). The indices used were a performance index taking the characteristics of VDT work into account; a subjective mental workload measurement scale ; stress and arousal mood checklist; visual functions ; autonomic nervous system activity and brain activity. The results suggested that in VDT work, whether a large screen or monocular HMD is used, the load on visual functions is large.At the same time, the expression of psycho-physiological strain was explored by looking at fluctuations in autonomic nerve function, etc., but no signs of significant load were observed for VDT work using a large screen. However, when the monocular HMD was used, the results suggested that significant fluctuations were caused in cardiovascular autonomic nerve activity and brain activity. Also, for both kinds of work subjective feelings of fatigue clearly increased.In fiscal 2004, the mutual relationships between these experimental results and various indices were examined, and ergonomics checkpoints were formulated relating to work using text display large screen VDT, which industry is planning to introduce, and work using monocular HMD. Together with this, an ergonomics checklist required for normal VDT work was added after researching the literature, so that the list could be used generally in the IT working environment. Its purposes are to check effects on health and have indices for improvement of work conditions/environment.