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An Evaluation of BrailleTouch: Mobile Touchscreen Text Entry for the Visually Impaired
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2012 (English)In: Proceedings of the 14th International Conference on Human-computer Interaction with Mobile Devices and Services, Association for Computing Machinery (ACM), 2012, 317-326 p.Conference paper, Published paper (Refereed)
Resource type
Text
Abstract [en]

We present the evaluation of BrailleTouch, an accessible keyboard for blind users on touchscreen smartphones. Based on the standard Perkins Brailler, BrailleTouch implements a six-key chorded braille soft keyboard. Eleven blind participants typed for 165 twenty-minute sessions on three mobile devices: 1) BrailleTouch on a smartphone; 2) a soft braille keyboard on a touchscreen tablet; and 3) a commercial braille keyboard with physical keys. Expert blind users averaged 23.2 words per minute (wpm) on the BrailleTouch smartphone. The fastest participant, a touchscreen novice, achieved 32.1 wpm during his first session. Overall, participants were able to transfer their existing braille typing skills to a touchscreen device within an hour of practice. We report the speed for braille text entry on three mobile devices, an in depth error analysis, and the lessons learned for the design and evaluation of accessible and eyes-free soft keyboards.

Place, publisher, year, edition, pages
Association for Computing Machinery (ACM), 2012. 317-326 p.
Series
MobileHCI ’12
Keyword [en]
accessibility, blindness, chording, gestures, mobile devices, multi-touch interaction, text entry, touchscreens
National Category
Computer Science Human Computer Interaction Media and Communication Technology
Research subject
Computer Science; Human-computer Interaction
Identifiers
URN: urn:nbn:se:kth:diva-184703DOI: 10.1145/2371574.2371623OAI: oai:DiVA.org:kth-184703DiVA: diva2:916504
Conference
International Conference on Human-computer Interaction with Mobile Devices and Services
Note

QC 20160418

Available from: 2016-04-03 Created: 2016-04-03 Last updated: 2016-04-20

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fulltext(895 kB)229 downloads
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Publisher's full textAn Evaluation of BrailleTouch

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Romero, Mario

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf