B#: Chord-based correction for multitouch braille input

Hugo Nicolau, Kyle Montague, Tiago Guerreiro, João Guerreiro, Vicki L. Hanson

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

17 Citations (Scopus)

Abstract

Braille has paved its way into mobile touchscreen devices, providing faster text input for blind people. This advantage comes at the cost of accuracy, as chord typing over a flat surface has proven to be highly error prone. A misplaced finger on the screen translates into a different or unrecognized character. However, the chord itself gathers information that can be leveraged to improve input performance. We present B#, a novel correction system for multitouch Braille input that uses chords as the atomic unit of information rather than characters. Experimental results on data collected from 11 blind people revealed that B# is effective in correcting errors at character-level, thus providing opportunities for instant corrections of unrecognized chords; and at word-level, where it outperforms a popular spellchecker by providing correct suggestions for 72% of incorrect words (against 38%). We finish with implications for designing chord-based correction system and avenues for future work.

Original languageEnglish
Title of host publicationCHI 2014
Subtitle of host publicationOne of a CHInd - Conference Proceedings, 32nd Annual ACM Conference on Human Factors in Computing Systems
PublisherAssociation for Computing Machinery, Inc
Pages1705-1708
Number of pages4
ISBN (Print)9781450324731
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes
EventSIGCHI Conference on Human Factors in Computing Systems - Metro Toronto Convention Centre, Toronto, Canada
Duration: 26 Apr 20141 May 2014
http://chi2014.acm.org/

Publication series

NameConference on Human Factors in Computing Systems - Proceedings

Conference

ConferenceSIGCHI Conference on Human Factors in Computing Systems
Abbreviated titleCHI '14
CountryCanada
CityToronto
Period26/04/141/05/14
Internet address

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