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J Nerv Ment Dis. 1994 Apr;182(4):193-204.

Domains of psychopathology: an approach to the reduction of heterogeneity in schizophrenia.

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  • 1Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore 21201, USA.


The manifest clinical heterogeneity of schizophrenia, combined with the failure, to date, to demonstrate the existence of a unitary disease process, has led to the conceptualization of schizophrenia as a pathophysiologically heterogeneous disorder. Various approaches have been developed to define homogeneous subgroups of schizophrenic patients. An alternative approach to the use of multiple criteria for defining putative disease entities is the use of specific sign and symptom complexes, or domains of psychopathology, for reducing heterogeneity. There is now considerable evidence supporting the separation of schizophrenic symptoms into three domains: hallucinations and delusions, thought disorder, and deficit symptoms. The conceptual evolution and validating evidence for this approach are reviewed, and an illustration of how the domains of psychopathology are applied in schizophrenia research is presented.

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