Touch key design for target selection on a mobile phone

  • Authors:

  • Yong S. Park;Sung H. Han;Jaehyun Park;Youngseok Cho

  • Affiliations:

  • Pohang University of Science and Technology (POSTECH), Pohang, South Korea;Pohang University of Science and Technology (POSTECH), Pohang, South Korea;Pohang University of Science and Technology (POSTECH), Pohang, South Korea;Pohang University of Science and Technology (POSTECH), Pohang, South Korea

  • Venue:
  • Proceedings of the 10th international conference on Human computer interaction with mobile devices and services
  • Year:
  • 2008

Quantified Score

Hi-index 0.00

Visualization

Abstract

Mobile phones with a touch screen replacing traditional keypads have been introduced to the market. Few studies, however, have been conducted on the touch interface design for a mobile phone. This study investigated the effects of touch key sizes and locations on the one-handed thumb input that is popular in mobile phone interactions. Three different touch key sizes (i.e. square shape with 4mm, 7mm, and 10mm wide) and twenty five locations were examined in an experiment. The results provided two groups of touch key locations (an appropriate and an inappropriate region) with respect to three usability measures including success rate, number of errors, and pressing convenience. In addition, a hits distributions based algorithm was applied to target selection tasks, which statistically improved the performance. The results of this study could be used to design touch keys so as to enhance the usability of mobile phones with a touch screen.