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Ann T. Summerfelt; Larry D. Alphs, MD, PhD; Frank R. Funderburk, PhD; Milton E. Strauss, PhD
Maryland Psychiatric Research Center PO Box 21247 Baltimore, MD 21228

Althea M.I. Wagman, PhD
Schizophrenia Research Branch National Institute of Mental Health Rockville, MD 20857

Arch Gen Psychiatry. 1991;48(3):282-283.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.—

During the past several years important reports have appeared in the ARCHIVES^1-3 concerning relationships between regional cerebral blood flow and impaired Wisconsin Card Sort (WCS) performance in schizophrenia. One provocative finding has been that impairment on this task is not corrected by instruction.⁴ The WCS task requires the respondent to match cards that vary simultaneously in a number of dimensions (color, form, and number of elements) to one of four models. The subject is told whether each placement is correct or incorrect and must discover the correct sorting rule from this feedback. The first rule is to sort by color. When this rule has been learned, the correct dimension is changed, first to form and then to number. The subject is not informed of this change; rather, he or she must discover the new rule.⁵

Although many different scores can be derived from the . . . [Full Text PDF of this Article]

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