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Double dissociations never license simple inferences about underlying brain organization, especially in developmental cases

Published online by Cambridge University Press:  11 August 2003

James L. McClelland
Affiliation:
Department of Psychology and the Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh, PA 15213 jlm@cnbc.cmu.edu http://www.cnbc.cmu.edu/~jlm
Gary Lupyan
Affiliation:
Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh, PA 15213 glupyan@cnbc.cmu.edu http://www.cnbc.cmu.edu/~glupyan

Abstract

Different developmental anomalies produce contrasting deficits in a single, integrated system. In a network that inflects regular and exception verbs correctly, a disproportionate deficit with exceptions occurs if connections are deleted, whereas a disproportionate deficit with regulars occurs when an auditory deficit impairs perception of the regular inflection. In general, contrasting deficits do not license the inference of underlying modularity.

Type
Brief Report
Copyright
© 2002 Cambridge University Press

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