BrailleType: Unleashing Braille over Touch Screen Mobile Phones

  • João Oliveira
  • Tiago Guerreiro
  • Hugo Nicolau
  • Joaquim Jorge
  • Daniel Gonçalves
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6946)

Abstract

The emergence of touch screen devices poses a new set of challenges regarding text-entry. These are more obvious when considering blind people, as touch screens lack the tactile feedback they are used to when interacting with devices. The available solutions to enable non-visual text-entry resort to a wide set of targets, complex interaction techniques or unfamiliar layouts. We propose BrailleType, a text-entry method based on the Braille alphabet. BrailleType avoids multi-touch gestures in favor of a more simple single-finger interaction, featuring few and large targets. We performed a user study with fifteen blind subjects, to assess this method’s performance against Apple’s VoiceOver approach. BrailleType although slower, was significantly easier and less error prone. Results suggest that the target users would have a smoother adaptation to BrailleType than to other more complex methods.

Keywords

Blind Braille Mobile Devices Text-Entry Touch screens 

References

  1. 1.
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    Guerreiro, T., et al.: NavTap and BrailleTap: Non-Visual Texting Interfaces. In: RESNA 2008, Arlington, VA (2008) Google Scholar
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    MacKenzie, I., Tanaka-Ishii, K.: Text entry systems: Mobility, accessibility, universality. Morgan Kaufmann, San Francisco (2007)Google Scholar
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    Yfantidis, G., Evreinov, G.: Adaptive Blind Interaction Technique for Touchscreens. Universal Access in the Information Society 4(4), 328–337 (2006)CrossRefGoogle Scholar

Copyright information

© IFIP International Federation for Information Processing 2011

Authors and Affiliations

  • João Oliveira
    • 1
  • Tiago Guerreiro
    • 1
  • Hugo Nicolau
    • 1
  • Joaquim Jorge
    • 1
  • Daniel Gonçalves
    • 1
  1. 1.INESC-IDTechnical University of LisbonPortugal

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