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Phenotypic Variations of a Schizophrenic Genotype

David Rosenthal, PhD; Olive W. Quinn, PhD

Arch Gen Psychiatry. 1977;34(7):817-827.

Abstract
• This article provides an in-depth analysis of hallucinations in monozygous quadruplets concordant for schizophrenia. Since all four are genetically identical, deviations among them with regard to various aspects of hallucinations probably represent the effects that nongenetic factors can produce in hallucinating schizophrenics. Concordances probably represent the effects of genetic factors. We present here findings based on this research strategy, and a brief review of the literature on hallucinations.

Author Affiliations
From the Laboratory of Psychology and Psychopathology (Dr Rosenthal), National Institute of Mental Health, Bethesda, Md, and the Department of Sociology and the Center of Sociological Research (Dr Quinn), Goucher College, Towson, Md.

Footnotes
Accepted for publication March 23, 1976.

Reprint requests to Laboratory of Psychology and Psychopathology, Building 10, Room 2N252, National Institute of Mental Health, 9000 Rockville Pike, Bethesda, MD 20014 (Dr Rosenthal).

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