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SUMMARY:Shape writing: a fast and fluid writing system designed for mobile
  devices - Per Ola Kristensson
DTSTART:20070926T130000Z
DTEND:20070926T140000Z
UID:TALK8140@talks.cam.ac.uk
CONTACT:David MacKay
DESCRIPTION:Mobile devices gain increasing computational power and storage
  capabilities\, and there are already mobile phones that can show movies\,
  act as digital music players and offer full-scale web browsing. The bottl
 eneck for information flow is however limited by the inefficient communica
 tion channel between the user and the small device. The small mobile phone
  form factor has proven to be surprisingly difficult to overcome and limit
 ed text entry capabilities are in effect crippling mobile devices’ use e
 xperience. The desktop keyboard is too large for mobile phones\, and the k
 eypad too limited. In recent years\, advanced mobile phones have come equi
 pped with touch-screens that enable new text entry solutions. In this talk
  I will report on how we explored how software keyboards on touch-screens 
 can be improved to provide an efficient and practical text entry experienc
 e on mobile devices. The central hypothesis is that it is possible to comb
 ine three elements: software keyboard\, language redundancy and pattern re
 cognition\, and create a new effective text entry interface. Words form sh
 apes on the software keyboard layout. Users write words by articulating th
 e shapes for words on the software keyboard. Experimental results show tha
 t novice users can write text with an average entry rate of 25 wpm and an 
 error rate of 1% after 35 minutes of practice. An accelerated novice learn
 ing experiment shows that users can exactly copy a single well-practiced p
 hrase with an average entry rate of 46.5 wpm\, with individual phrase entr
 y rate measurements up to 99 wpm. Taken together\, the quantitative result
 s show that shape writing is among the fastest mobile text entry interface
 s\, both initially and after practice\, that are currently known.
LOCATION:TCM Seminar Room\, Cavendish Laboratory\, Department of Physics
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