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II. Plausible and Implausible Errors on a Modification of the Progressive Matrices Test

IRWIN FEINBERG, M.D.; EUGENIE M. GARMAN, B.A.

Arch Gen Psychiatry. 1961;4(2):191-201.

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

Introduction

The rationale of the present studies was presented in a previous paper.¹ Briefly, the argument may be recapitulated as follows: It is postulated that schizophrenia produces 2 kinds of mental change: (1) a reduction, variable in nature and degree, in level of intellectual function, and (2) qualitative changes in the nature of thought processes (loosening of associations, delusions, primary process thinking) which permit recognition of the illness as a distinct syndrome. Cameron² has designated these changes as "impairment" and "disorganization," respectively. It may also be suggested that they are analogous in some respects to the negative and positive symptoms described by Hughlings Jackson³ in neurological disease.

Most psychometric investigations of cognitive performance in various clinical groups result in the findings that normal subjects achieve the highest mean scores, schizophrenics are intermediate, and subjects with chronic brain disease perform most poorly. It . . . [Full Text PDF of this Article]

Author Affiliations
BETHESDA, MD.

Laboratory of Clinical Science, National Institute of Mental Health, National Institutes of Health, Public Health Service, U.S. Department of Health, Education, and Welfare.

Footnotes
Submitted for publication June 14, 1960.

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