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Effects of Grip Curvature and Hand Anthropometry for the Manual Operation of Handheld Touchscreen Device

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Authors

안성희

Advisor
윤명환
Major
공과대학 산업공학과
Issue Date
2014-02
Publisher
서울대학교 대학원
Keywords
handheld touchscreenscurvaturecomfortEMGuser interfacethumb
Description
학위논문 (석사)-- 서울대학교 대학원 : 산업공학과, 2014. 2. 윤명환.
Abstract
To design handheld devices, physical comfort is one of the most crucial requirements. Recently, curved handheld touchscreens were released for enhancing comfort, but the effect has not been proved yet. There are two ergonomic factors, anthropometric and physiological factors, respecting comfort. This means the design should consider variation of hands in size and shape as well as muscle utilization. Through statistical analysis, it has been showed that the Korean population has large variability in both size and shape. Also, it has been observed that 1/3 of user population of smartphone operate the device unimanully by a previous research.
This study aimed to verify the effect of anthropometric factors of hands and curvature on comfort when using handheld touchscreen devices. Comfort level was measured employing both the subjective rating and EMG methods. Three mock-ups of handheld touchscreen device with different curvatures were utilized. One was flat device and the others had curvatures of 400R and 100R. An experiment was conducted on tapping, typing and dragging tasks. The results indicated that curvature of the handheld touchscreen devices did not affect muscle activities, but subjective comfort level. Moreover, size and shape of hand were found to affect muscle activities and comfort level when using the handheld touchscreen devices. Target location and moving direction of thumb were also factors that significantly affected muscle activities. Overall, this study suggests that user interface design may be more important than curvature of handheld touchscreen determining comfort of touch screen use.
Language
English
URI
https://hdl.handle.net/10371/123568
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