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CATEGORIES:Inference Group
SUMMARY:Shape writing: a fast and fluid writing system des
 igned for mobile devices - Per Ola Kristensson
DTSTART;TZID=Europe/London:20070926T140000
DTEND;TZID=Europe/London:20070926T150000
UID:TALK8140AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/8140
DESCRIPTION:Mobile devices gain increasing computational power
  and storage capabilities\, and there are already 
 mobile phones that can show movies\, act as digita
 l music players and offer full-scale web browsing.
  The bottleneck for information flow is however li
 mited by the inefficient communication channel bet
 ween the user and the small device. The small mobi
 le phone form factor has proven to be surprisingly
  difficult to overcome and limited text entry capa
 bilities are in effect crippling mobile devices’ u
 se experience. The desktop keyboard is too large f
 or mobile phones\, and the keypad too limited. In 
 recent years\, advanced mobile phones have come eq
 uipped with touch-screens that enable new text ent
 ry 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 practi
 cal text entry experience on mobile devices. The c
 entral hypothesis is that it is possible to combin
 e three elements: software keyboard\, language red
 undancy and pattern recognition\, and create a new
  effective text entry interface. Words form shapes
  on the software keyboard layout. Users write word
 s by articulating the shapes for words on the soft
 ware keyboard. Experimental results show that novi
 ce users can write text with an average entry rate
  of 25 wpm and an error rate of 1% after 35 minute
 s of practice. An accelerated novice learning expe
 riment shows that users can exactly copy a single 
 well-practiced phrase with an average entry rate o
 f 46.5 wpm\, with individual phrase entry rate mea
 surements up to 99 wpm. Taken together\, the quant
 itative results show that shape writing is among t
 he fastest mobile text entry interfaces\, both ini
 tially and after practice\, that are currently kno
 wn.
LOCATION:TCM Seminar Room\, Cavendish Laboratory\, Departme
 nt of Physics
CONTACT:David MacKay
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