The Evaluation of Operating Posture in Typing the QWERTY Keyboard on PDA

Authors:
Han-Chi Hsiao;Fong-Gong Wu;Ronald Hsi;Chih-I Ho;Wen-Zhou Shi;Chien-Hsu Chen
Affiliations:
Department of Industrial Design, National Cheng Kung University, Tainan, Taiwan 70101;Department of Industrial Design, National Cheng Kung University, Tainan, Taiwan 70101;Department of Industrial Design, National Cheng Kung University, Tainan, Taiwan 70101;Department of Industrial Design, National Cheng Kung University, Tainan, Taiwan 70101;Department of Industrial Design, National Cheng Kung University, Tainan, Taiwan 70101;Department of Industrial Design, National Cheng Kung University, Tainan, Taiwan 70101
Venue:
EHAWC '09 Proceedings of the International Conference on Ergonomics and Health Aspects of Work with Computers: Held as Part of HCI International 2009
Year:
2009

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Abstract

In this research, we observed the user's posture while using PDA. 30 participants typed the keys with standard QWERTY keyboard on the PDA. At the end of the experiments the participants who have professional background in design were asked to complete an open-ended questionnaire, which is in order to evaluate the usability of the PDA. In the final, we presented the suggestion of design criterion for keyboard, as to provide the references for future PDA design. The statistical result of the posture while using the PDA revealed that the most users held PDA with both hands and pressed keys with both thumbs. The findings in this research suggest that when we design small input devices such as PDA in the future, the stability of the keyboard usage should be taken into considerations to enhance its input performance and improve user experience.