Semantic Cognition: A Parallel Distributed Processing Approach (Bradford Books)

Rogers, Timothy T.; McClelland, James L.

ISBN 10: 0262182394 / ISBN 13: 9780262182393

Editore: The MIT Press, 2004

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Codice articolo ABE-1618512162226

Dati bibliografici

• Titolo: Semantic Cognition: A Parallel Distributed Processing Approach (Bradford Books)
• Editore: The MIT Press
• Data di pubblicazione: 2004
• Lingua: Inglese
• ISBN 10: 0262182394
• ISBN 13: 9780262182393
• Rilegatura: Hardcover
• Edizione: 1st Edition
• Condizione: New

Descrizione articolo

Riassunto

This groundbreaking monograph offers a mechanistic theory of the representation and use of semantic knowledge, integrating the strengths and overcoming many of the weaknesses of hierarchical, categorization-based approaches, similarity-based approaches, and the approach often called "theory theory." Building on earlier models by Geoffrey Hinton in the 1980s and David Rumelhart in the early 1990s, the authors propose that performance in semantic tasks arises through the propagation of graded signals in a system of interconnected processing units. The representations used in performing these tasks are patterns of activation across units, governed by weighted connections among them. Semantic knowledge is acquired through the gradual adjustment of the strengths of these connections in the course of day-to-day experience.The authors show how a simple computational model proposed by Rumelhart exhibits a progressive differentiation of conceptual knowledge, paralleling aspects of cognitive development seen in the work of Frank Keil and Jean Mandler. The authors extend the model to address aspects of conceptual knowledge acquisition in infancy, disintegration of conceptual knowledge in dementia, "basic-level" effects and their interaction with expertise, and many findings introduced to support the idea that semantic cognition is guided by naive, domain-specific theories.

Informazioni sugli autori

James L. McClelland is Bingham Professor of Psychology and Cognitive Neuroscience at Carnegie Mellon University and Codirector of the Center for the Neural Basis of Cognition at Carnegie Mellon and the University of Pittsburgh.

Timothy T. Rogers is a research scientist at the Medical Research Council Cognition and Brain Sciences Unit in Cambridge, England.