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SUMMARY:Shape writing: fluid text entry on mobile devices - Per Ola Kriste
 nsson
DTSTART:20070509T130000Z
DTEND:20070509T140000Z
UID:TALK7387@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 r
 ecognition\, and create a new effective text entry interface. Words form s
 hapes on the software keyboard layout. Users write words by articulating t
 he shapes for words on the software keyboard.  Experimental results show t
 hat novice users can write text with an average entry rate of 25 wpm and a
 n error rate of 1% after 35 minutes of practice. An accelerated novice lea
 rning experiment shows that users can exactly copy a single well-practiced
  phrase with an average entry rate of 46.5 wpm\, with individual phrase en
 try rate measurements up to 99 wpm. Taken together\, the quantitative resu
 lts show that shape writing is among the fastest mobile text entry interfa
 ces\, both initially and after practice\, that are currently known.\n\nThi
 s is joint work with Dr. Shumin Zhai.\n\nThis work was carried out at IBM 
 Almaden Research Center and Linköping University.
LOCATION:TCM Seminar Room\, Cavendish Laboratory\, Department of Physics
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