Influences of the edge radius of curvature of tactile dots and bars on their discriminability

Wataru Toyoda, Kouki Doi, Hiroshi Fujimoto

    Research output: Contribution to journalArticle

    Abstract

    Tactile dots and bars serve as tactile landmarks so that people with visual impairment can use same consumer products as those used by sighted people. However, reliable age-related data on the appropriate sizes and the shapes was not necessarily available. The purpose of this study is to evaluate influences of edge radius of curvature of tactile dots and bars on their discriminability in younger and older people to determine the appropriate size of tactile bars (as distinguished from tactile dots). Sighted younger and older participants tactually discriminated the tactile dots and bars presented individually, in random order, by a two-alternative forced-choice task. The results showed that both participants discriminated tactile bars from tactile dots faster and more accurately as the dimensional difference between bar length and width increased, regardless of conditions of edge radius of curvature. Therefore, longer dimensional difference between width and length of tactile bars is an important factor to discriminate tactile bars correctly. On the other hand, tactile dots with a larger edge radius of curvature have higher discriminability than tactile dots with a smaller edge radius of curvature in the case of dots of identical height.

    Original languageEnglish
    Pages (from-to)5378-5380
    Number of pages3
    JournalWork
    Volume41
    Issue numberSUPPL.1
    DOIs
    Publication statusPublished - 2012

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    Touch
    Vision Disorders

    Keywords

    • Accessibility
    • Consumer products
    • ISO 24503
    • JIS S 0011
    • Tactile perception

    ASJC Scopus subject areas

    • Public Health, Environmental and Occupational Health
    • Rehabilitation
    • Medicine(all)

    Cite this

    Influences of the edge radius of curvature of tactile dots and bars on their discriminability. / Toyoda, Wataru; Doi, Kouki; Fujimoto, Hiroshi.

    In: Work, Vol. 41, No. SUPPL.1, 2012, p. 5378-5380.

    Research output: Contribution to journalArticle

    Toyoda, Wataru ; Doi, Kouki ; Fujimoto, Hiroshi. / Influences of the edge radius of curvature of tactile dots and bars on their discriminability. In: Work. 2012 ; Vol. 41, No. SUPPL.1. pp. 5378-5380.
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