Categorical Perception Effects Induced by Category Learning.

Livingston, K., Andrews, J. and Harnad, S. (1998) Categorical Perception Effects Induced by Category Learning. Journal of Experimental Psychology: Learning, Memory and Cognition, 24 (3). pp. 732-753.

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Abstract

We report a series of studies designed to determine whether effects
similar to those observed in the innate categorical perception (CP) of
color and phonemes are induced during category learning. In Experiment 1
no evidence is found for such effects when stimuli vary unidimensionally.
Experiments 2 and 3 demonstrate a within-category compression effect but no
between-category separation effect for stimuli varying in two dimensions.
Compression only is also shown in Experiment 4, which uses pictures of
actual objects. MDS analyses of these data illustrate how within-category
compression effects without separation effects are sufficient for
categorization, and also show that learning changes the dimensional
structure of similarity space. Results are compared with those from other
studies exploring similar phenomena, and with neural network simulations,
and the paper closes with suggestsions for the direction of future research
on these phenomena.

Creators:	Kenneth Livingston, Janet Andrews, Stevan Harnad
Item Type:	Article
Keywords:	categorical perception, perceptual learning, Whorf Hypothesis, symbol grounding, color perception, phoneme perception, similarity
Research Group:	Intelligence, Agents, Multimedia
Deposited On:	08 Nov 2002 by Harnad, Stevan
Alternative Locations:	http://www.ecs.soton.ac.uk/~harnad/Papers/Harnad/h...
ID Code:	6883
Last Modified:	11 Nov 2009 12:12
Performance Indicator:	EZ~03~01~11
Citations:	ISI: 68, Google Scholar: 112