Influences of the Height and the Tip Radius of Curvature of Tactile Dots on the Operational Performance in Cellular Phones

• TOYODA Wataru

  Waseda University, Graduate School of Human Sciences

• 齋藤 健太郎

  早稲田大学大学院人間科学研究科

• 土井 幸輝

  国立特別支援教育総合研究所教育情報部

• 藤本 浩志

  早稲田大学人間科学学術院

Bibliographic Information

Other Title

• 凸点の高さと先端部の曲率半径が携帯電話の操作性に及ぼす影響

Abstract

Tactile dots (dot-shaped tactile symbols) placed on the operation keys of consumer products such as cellular phones contribute to improving accessibility for everyone, including persons with visual impairment. JISC (Japanese Industrial Standards Committee) and ISO (International Organization for Standardization) standardized tactile dots and bars. However, sufficient reliable data on the appropriate sizes and cross-section shapes of tactile dots and bars was not necessarily available. Therefore, more quantitative data for optimal dimensions of tactile dots and bars is required to revise existing standards and devise new standards. In this paper, we evaluated influences of the height (0.1, 0.3, 0.55 and 0.75 mm, without tactile dot) and the tip radius of curvature (0.1, 0.3, 0.5, 0.7 and 0.9 mm) of tactile dots on the operational performance in cellular phones. 16 sighted younger participants, whose hand was covered by a curtain, were asked to operate cellular phones with a tactile dot on its key 5 and without tactile dots. As the result, both too high and low height dots are not effective to improve the operational performance of cellular phones and there is an appropriate range of the height of tactile dots regardless of the tip radius of curvature. Furthermore, participants performed better at a particular height with larger tip radius of curvature.

Journal

• TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C

  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 78 (794), 3495-3503, 2012

  The Japan Society of Mechanical Engineers

Keywords

• Human Engineering
• Ergonomics
• Assistive Technology
• Human Interface
• Standard
• Accessible Design
• Tactile Dot
• Height
• Radius of Curvature
• Cellular Phone

Details

• CRID: 1390282681363387904
• NII Article ID: 130002051587
• DOI: 10.1299/kikaic.78.3495
• ISSN: 18848354
• ISSN: 03875024
• Web Site: https://www.jstage.jst.go.jp/article/kikaic/78/794/78_3495/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed