Human-Computer Interaction: Ergonomics and User Interfaces - Vol. 1

By Hans-Jörg Bullinger; Jürgen Ziegler | Go to book overview
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Secondly, the preferred eye to monitor distance (about 58 cm) for PC workstation was found to be similar to that of reported in reference (c). But the distance is relatively shorter than those reported in references (a) and (b) for PC and CAD workstations.
Conclusions and Recommendationds
The findings of this study reveal that the Taiwanese VDT users preferred to sit in a pronounced backward leaning posture with upper arm slightly elevated, and elbow angle greater than 901 for both PC and CAD workstations. But there are some differences between the posture recommended by general VDT workstation design guideline and the actual preferred posture. As for the comparison of preferred settings between PC and CAD workstation, the main differences occurred at the head-neck posture and gaze angle which were mainly caused by the difference in monitor size. A more erect but still backward monitor tilt setting was preferred for CAD workstation. Since there is no significant difference in the working height, seat height and monitor base stand height between PC and CAD workstation, similar adjustable dimensions should be specified for designing the two types of VDT workstations.The preferred posture angles of upper body showed some consistency with previous studies based on western data. But the preferred monitor center height, keyboard height and seat height were significantly lower than the previous reports based on western data. It seems that there existed some additional factors other than the anthropometric differences such as the influence of the subjects' field VDT workstation settings which might attribute to the above phenomenon.
Grandjean, E., Münting, W. and Pidermann, M. ( 1983). VDT workstation design: preferred settings and their effects, Human Factors, 25, 161-175.
Ong, C. N., Koh, D., Phoon, W. O. and Low, A. ( 1988). Anthropometrics and display station preferences of VDU operators, Ergonomics, 31, 337-347.
Van der G. Heiden and Krueger, H. ( 1984). Evaluation of ergonomic features of the computer vision instaview graphics terminal. In E. Grandjean and E. Vigliani , eds., Ergonomic Aspects of Visual Terminals. Taylor and Francis, London.
Wang, E. M. Y., Wang, M. J., Yeh, W. Y. Shih, Y. C. and Lin, Y. C. ( 1999). Development of anthropometric work environment for Taiwanese workers, Intemational Journal of Industrial Ergonomics, 23, 3-8.


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