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SUMMARY:CHI @ Cambridge! - Vaiva Kalnikaité \, Steve Whittaker\, Jarinee 
 Chattratichart
DTSTART:20071008T174500Z
DTEND:20071008T193000Z
UID:TALK8325@talks.cam.ac.uk
CONTACT:Michele Ide-Smith
DESCRIPTION:Cambridge Usability Group events return after a long summer br
 eak with an opportunity to hear two excellent papers presented earlier thi
 s year at CHI 2007.\n\nDate: Monday 8th October\nTime: 6.30 for 6.45\nVenu
 e: Microsoft Research\, Cambridge\nCost: The event is FREE and you do not 
 need to be a UK UPA member to attend\nRegistration: Please email cambridge
 .usability@gmail.com to reserve a place.  \n\nLocation map and directions:
  www.research.microsoft.com/aboutmsr/visitmsr/cambridge\n \nThe first pape
 r and winner in the best paper awards at CHI 2007 is *“Capturing life ex
 periences: Software or wetware?: discovering when and why people use digit
 al prosthetic memory”* presented by Vaiva Kalnikaité and Steve Whittake
 r.\n\n*Abstract*\nOur lives are full of memorable and important moments\, 
 as well as important items of information. The last few years have seen th
 e proliferation of digital devices intended to support prosthetic memory (
 PM)\, to help users recall experiences\, conversations and retrieve person
 al information. We nevertheless have little systematic understanding of wh
 en and why people might use such devices\, in preference to their own orga
 nic memory (OM). Although OM is fallible\, it may be more efficient than a
 ccessing information from a complex PM device. We report a controlled lab 
 study which investigates when and why people use PM and OM. We found that 
 PM use depended on users' evaluation of the quality of their OM\, as well 
 as PM device properties. In particular\, we found that users trade-off Acc
 uracy and Efficiency\, preferring rapid access to potentially inaccurate i
 nformation over laborious access to accurate information. We discuss the i
 mplications of these results for future PM design and theory. Rather than 
 replacing OM\, future PM designs need to focus on allowing OM and PM to wo
 rk in synergy.\n\n*About the speakers*\nFollowing an MA at Cambridge\, and
  PhD at St. Andrews\, Steve took various research posts either side of the
  Atlantic - HP Labs Bristol\, The Stanford Center\, Lotus Boston\, Edinbur
 gh University and finally AT&T Labs\, New Jersey.  In 2003\, he returned t
 o the UK to teach and research as Professor in Information Retrieval\, She
 ffield University.  Steve continues to win research grants\, file patents 
 and publish widely. His research interests include Computer Mediated Commu
 nication\, and Multimodal Interfaces.\n\nVaiva is a PhD student in Departm
 ent of Information Studies\, Sheffield University.\n\nOur second paper\,  
 *“Usability Testing: What Have We Overlooked?”*\, by Gitte Lindgaard a
 nd Jarinee Chattratichart will be presented by Jarinee.  This paper was no
 minated in the best paper awards at CHI 2007.\n\n*Abstract*\nOne way to ke
 ep down the cost of usability tests is to run an optimum number of session
 s - enough to reveal most of the problems\, but not so many that later ses
 sions simply duplicate the results of earlier ones.  Nearly 15 years ago\,
  Jakob Nielsen (useit.com) claimed the optimum number of users to run was 
 5\, and this magic number was adopted by many organisations.  Many empiric
 al studies were conducted but could not overturn or fully support the clai
 m.  Many discussion panels at major HCI conferences failed to reach consen
 sus\, or close the debate.  As Larry Constantine (Constantine & Lockwood\,
  Ltd.) summarised at the last panel (held at CHI'2003)\, '.usability testi
 ng now appears to be a highly variable art in which the results depend on 
 who is testing what by which protocol with which particular subjects'. In 
 this talk\, Jarinee will provide evidence that overturns this magic number
  5\, and suggest a new research direction for improving usability test res
 ults.\n\n*About the speaker*\nJarinee Chattratichart graduated in Computer
  Science from Imperial College London and her PhD at Brunel University con
 cerned the Usability of Visual Programming Languages.  She has subsequentl
 y taught and conducted research at Westminster\, Guidhall and now Kingston
  University. \n\n
LOCATION:Microsoft Research Ltd\, 7 J J Thomson Avenue (Off Madingley Road
 )\, Cambridge
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