A reinterpretation of some pathological disturbances in conceptual breadth.

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Abstract
"The present study was designed to investigate the possibility that both overinclusion and overexclusion errors on conceptual sorting tasks by schizophrenics are attributable, at least in part, to a tendency to use concepts of a specific preferred breadth regardless of their appropriateness. This suggestion was investigated by means of a task in which names of objects were sorted on the basis of conceptual categories of varying breadth. The hypothesis was that as the instructed conceptual category becomes broader, schizophrenics increase their errors of overexclusion but decrease their errors of overinclusion. The hypothesis was confirmed. In addition . . . brain damaged . . . [Ss] showed the opposite error preference." From Psyc Abstracts 36:04:4JQ14C. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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