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"ACM SIGCHI General Interest Announcements (Mailing List)" <[log in to unmask]>
Tue, 26 Oct 2004 12:07:26 -0400
Lisa Neal <[log in to unmask]>
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Lisa Neal <[log in to unmask]>
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The Cognitive Science Society is hosting a 2004-2005 virtual colloquium
series presented live via the Internet, with the first talk given by Nick
Chater and Neil Stewart. Register now to attend. Please note that this is
one hour earlier than the talks are normally scheduled. This presentation
marks two major firsts for the series. This will be the first presentation
originating from an institution outside the US, and we will be using a new
system, Elluminate, that will allow Mac users easy and direct access.

Time: Friday, Oct. 29, 2004

Noon US ET

Presenters: Nick Chater and Neil Stewart

Department of Psychology, University of Warwick 

Topic: Decision by Sampling 

We present a theory of decision by sampling (DbS) in which, in contrast with
traditional models, there are no underlying psychoeconomic scales (Stewart,
Chater & Brown, 2004). Instead, consistent with psychophysics, we assume
that an attribute's subjective value is constructed from binary, ordinal
comparisons with a small sample of attribute values from memory. The sample
reflects the decision context and the structure of the world. All attribute
values (e.g., time, probability, money, quality, etc.) are treated
identically. DbS accounts for: risk aversion; the common ratio and
consequence effects; losses looming larger than gains; distortion of
decision weights; hyperbolic temporal discounting; the similarity,
compromise, and attraction effects, and trade-off contrast in multiattribute
choices; preference reversals; violations of stochastic dominance and
cumulative independence; and prospect relativity. This talk will focus on
highlights and general motivation for DbS. 

Further information about this talk, the colloquium series, a schedule of
future talks, and an archive of previous talks are available at

Contact Janet Morrow, [log in to unmask], with any questions about
registration for this seminar.

Please forward this invitation to colleagues who would benefit from this
seminar or the series.

Tom Ward
Center for Creative Media 
Box 870172 
University of Alabama 
Tuscaloosa, AL 35487-0172 
email: [log in to unmask] 

Lisa Neal, Ph.D.
Editor-in-Chief, eLearn Magazine,
3 Valley Road, Lexington, MA 02421 USA
Phone: +1-781-861-7373
mailto:[log in to unmask]