Journal of Korean Institute of Industrial Engineers (대한산업공학회지)

Korean Institute of Industrial Engineers (대한산업공학회)
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Usability Evaluation of the Touch Keys for the Smart Watch

스마트 워치 터치스크린에서의 터치 키에 대한 사용성 연구

  • Kim, Su Young (Department of Industrial and Management Engineering, Korea University) ;
  • Ban, Kimin (Department of Industrial and Management Engineering, Korea University) ;
  • Choe, Jaeho (Department of Industrial and Management Engineering, Daejin University) ;
  • Jung, Eui S. (Department of Industrial and Management Engineering, Korea University)
  • 김수영 (고려대학교 산업경영공학과) ;
  • 반기민 (고려대학교 산업경영공학과) ;
  • 최재호 (대진대학교 산업경영공학과) ;
  • 정의승 (고려대학교 산업경영공학과)
  • Received : 2014.10.12
  • Accepted : 2014.12.15
  • Published : 2015.06.15
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Abstract

The smart watch is the most popular wearable computing device because it takes a form of wristwatch. Many smart watches have adopted the touch screen interface due to the limited size of display. This paper focuses on touch key size and spacing that affect the usability about the touch key of smart watch. The experiments were made for four touch key sizes (width${\times}$height; $5{\times}5$, $5{\times}7$, $7{\times}5$, $7{\times}7mm$) and nine touch key spacing (vertical${\times}$horizontal; $0{\times}0$, $0{\times}1$, $0{\times}3$, $1{\times}0$, $1{\times}1$, $1{\times}3$, $3{\times}0$, $3{\times}1$, $3{\times}3mm$). The completion time, error rate, control discomfort and identification discomfort were measured. The touch key size $7{\times}7$, $7{\times}5$ and the touch key spacing $3{\times}3$, $1{\times}3$ provided the best results in terms of the completion time and the control discomfort, while the square touch key ($7{\times}7$, $5{\times}5$) provided the best performance for the error rate measure. The result of this study can help ergonomically design the touch interface of the smart watch.

Keywords

References

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