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ReferencesNavigation arrowAuthorsNavigation arrowDerek Smith
Jun 20

“ ...that strange new zone between medium and message. That zone we call the interface ”

-- Steven Johnson, 1997

 
 

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Derek Smith

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Publications by Derek Smith (bibliography)

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2001
 
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MacKenzie, I. Scott, Kober, Hedy, Smith, Derek, Jones, Terry and Skepner, Eugene (2001): LetterWise: prefix-based disambiguation for mobile text input. In: Marks, Joe and Mynatt, Elizabeth D. (eds.) Proceedings of the 14th annual ACM symposium on User interface software and technology November 11 - 14, 2001, Orlando, Florida. pp. 111-120.

“A new technique to enter text using a mobile phone keypad is described. For text input, the traditional touchtone phone keypad is ambiguous because each key encodes three or four letters. Instead of using a stored dictionary to guess the intended word, our technique uses probabilities of letter sequences -- "prefixes" -- to guess the intended letter. Compared to dictionary-based methods, this technique, called LetterWise, takes significantly less memory and allows entry of non-dictionary words without switching to a special input mode. We conducted a longitudinal study to compare LetterWise to Multitap, the conventional text entry method for mobile phones. The experiment included 20 participants (10 LetterWise, 10 Multitap), and each entered phrases of text for 20 sessions of about 30 minutes each. Error rates were similar between the techniques; however, by the end of the experiment the mean entry speed was 36% faster with LetterWise than with Multitap.”

© All rights reserved MacKenzie et al. and/or ACM Press

 
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URL: http://www.interaction-design.org/references/authors/derek_smith.html
Jun 20

“ ...that strange new zone between medium and message. That zone we call the interface ”

-- Steven Johnson, 1997

 
 

Featured chapter

Read the fascinating history of Wearable Computing, told by its father, Steve Mann

Read Steve's chapter !

 
 

Latest books

The Social Design of Technical Systems: Building technologies for communities
by Brian Whitworth and Adnan Ahmad

 
Start reading

The Encyclopedia of Human-Computer Interaction, 2nd Ed.
by Mads Soegaard and Rikke Friis Dam

 
Start reading
 
 

Help us help you!

 
 
 
 
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