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학술대회자료
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대한인간공학회 대한인간공학회 학술대회논문집 대한인간공학회 2015 추계학술대회
발행연도
2015.10
수록면
127 - 131 (5page)

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Objective: The present study is intended to objectively classify grip postures for smartphone when user conduct tasks with hard keys and a touchscreen. Background: Grip postures need to be considered to ergonomic smartphone interface design for better usability such as controllability, user performance, and safety. Although grip postures for mobile devices were analyzed by previous researches to enhance the signal transmission performance and find out satisfaction level of each touchscreen area, grip postures of smartphones which users can conduct variety of tasks by using hard keys and a touchscreen have not been analyzed. Method: Forty five smartphone experienced users conducted tasks with nine different sized smartphone mock-ups. Two cameras were installed at both above and under the smartphone mock-up and recorded synchronized video of grips postures. The grips postures were classified by counting the number of fingers at each side of smartphones. Results: 1-finger back support & 4-finger grasp (72.2%) and 5-finger grasp (12.6%) were two major grip postures among ten different grip postures for hard key use, and 4-finger back support (66.0%) and 1-finger back support & 3-finger grasp (16.6%) were two major grip postures among twelve different grip postures for touchscreen use. Conclusion: Participants had interacted with smartphones by having various grips postures depending on the size of the smartphone and individual preference. Application: The classified major grip postures would be of use in ergonomic smartphone interface design.

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ABSTRACT
1. Introduction
2. Method
3. Results
4. Discussion
References

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