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Joanna Helga
Publications by Joanna Helga (bibliography)
2011
MacKenzie, I. Scott, Soukoreff, R. William and Helga, Joanna (2011): 1 thumb, 4 buttons, 20 words per minute: design and evaluation of H4-writer. In: Proceedings of the 2011 ACM Symposium on User Interface Software and Technology 2011. pp. 471-480.
“We present what we believe is the most efficient and quickest four-key text entry method available. H4-Writer uses Huffman coding to assign minimized key sequences to letters, with full access to error correction, punctuation, digits, modes, etc. The key sequences are learned quickly, and support eyes-free entry. With KSPC = 2.321, the effort to enter text is comparable to multitap on a mobile phone keypad; yet multitap requires nine keys. In a longitudinal study with six participants, an average text entry speed of 20.4”
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Changes to this page (author)
05 Apr 2012: AddedPage Information
Page maintainer: The Editorial TeamURL: http://www.interaction-design.org/references/authors/joanna_helga.html
Calendar
May 28
May
22
“ User error: replace user and press any key to continue. ”
-- Popular computer one-liner
- Share this quote on...
- Get more quotes via RSS or by joining our Usability Quote of the Day Facebook Page
Featured chapter
Read the fascinating history of Wearable Computing, told by its father, Steve Mann
Read Steve's chapter !
