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

2002财年，首次对要求在大屏幕(100英寸)上呈现共同信息的认知功能的VDT工作中的视觉和心理生理紧张的发生进行了研究，并以普通VDT工作为对照组，在2003财年使用单目头盔显示器(HMD)对VDT工作中视觉和心理生理紧张的发生进行了比较。使用的指标是考虑到VDT工作特点的绩效指数；主观脑力负荷测量量表；压力和唤醒情绪检查表；视觉功能；自主神经系统活动和脑活动。结果表明，在VDT作业中，无论是使用大屏幕还是使用单目头盔显示器，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索心理生理应激的表现，而使用大屏幕的VDT工作没有观察到显著负荷的迹象。然而，当使用单眼头盔时，结果表明心血管自主神经活动和脑活动引起显著波动。在2004财年，研究了这些实验结果与各项指标之间的相互关系，并制定了与使用行业计划引入的文本显示大屏幕VDT工作和使用单目头盔显示器工作相关的人机工程学检查点。此外，在研究文献的基础上，增加了正常VDT工作所需的人体工效学检查表，以便在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/环境的指数。

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.