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Ways of featuring in object categorization

Published online by Cambridge University Press:  01 February 1998

Philippe G. Schyns
Affiliation:
Department of Psychology, University of Glasgow, Glasgow G12 8QB, Scotlandphilippe@psy.gla.ac.uk www.gla.ac.uk/acad/psychology
Robert L. Goldstone
Affiliation:
Department of Psychology, Indiana University, Bloomington, IN 47405 rgoldsto@ucs.indiana.edu cognitrn.psych.indiana.edu/
Jean-Pierre Thibaut
Affiliation:
Department of Psychology, Université de Liège, Sart-Tilman 4000 Liège, Belgiumthibaut@ulg.ac.be

Abstract

The origin of features from nonfeatural information is a problem that should concern all theories of object categorization and recognition, not just the flexible feature approach. In contrast to the idea that new features must originate from combinations of simpler fixed features, we argue that holistic features can be created from a direct imprinting on the visual medium. Furthermore, featural descriptions can emerge from processes that by themselves do not operate on feature detectors. Once acquired, features can be decomposed into component features if required by other categorizations. We therefore argue that it is not necessary to separate holistic and componential approaches to representations, because the latter is a development of the former. The requirements for representational flexibility outstrip the performance of any existing computational models, but specific mechanisms of feature creation are discussed and evaluated. Challenges for feature creation mechanisms are discussed together with the constraints (perceptual, statistical, functional, and task) they will need to satisfy.

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Authors' Response
Copyright
© 1998 Cambridge University Press

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