chertok%ucbkim%Berkeley@sri-unix.UUCP (03/28/84)
From: chertok%ucbkim@Berkeley (Paula Chertok)
[Forwarded from the SRI-AI bboard by Laws@SRI-AI.]
BERKELEY COGNITIVE SCIENCE PROGRAM
Spring 1984
IDS 237B - Cognitive Science Seminar
Time: Tuesday, April 3, 1984, 11-12:30pm
Location: 240 Bechtel
OBJECTS, PARTS AND CATEGORIES
Barbara Tversky, Dept. of Psychology, Stanford
Many psychological, linguistic and anthropological measures
converge to a preferred level of reference, or BASIC LEVEL,
for common categories; for example, TABLE, in lieu of FURNI-
TURE or KITCHEN TABLE. Here we demonstrate that knowledge
of categories at that level (and only that level) of
abstraction is dominated by knowledge of parts. Basic level
categories are perceived to share parts and to differ from
one another on the basis of other features. We argue that
knowledge of part configuration underlies the convergence of
perceptual, behavioral and linguistic measures because part
configuration plays a large role in both appearance and
function. Basic level categories are especially informative
because structure is linked to function via parts at this
level.
***** Followed by a lunchbag discussion with speaker *****
*** in the IHL Library (Second Floor, Bldg. T-4) from 12:30-2 ***