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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  and
Gary Lupyan
James L. McClelland
Affiliation:
Department of Psychology and the Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh, PA 15213 [email protected] http://www.cnbc.cmu.edu/~jlm
Gary Lupyan
Affiliation:
Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh, PA 15213 [email protected] http://www.cnbc.cmu.edu/~glupyan
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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
Information
Behavioral and Brain Sciences , Volume 25 , Issue 6 , December 2002 , pp. 763 - 764
Copyright
© 2002 Cambridge University Press

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