February 1967

Major Psychiatric DisordersA Four-Dimensional Model

Author Affiliations

Galveston, Tex; Palo Alto, Calif; Paris
From the Department of Neurology and Psychiatry, University of Texas Medical Branch, Galveston (Dr. Overall); the Veterans Administration Hospital, Palo Alto, Calif (Dr. Hollister); and the Department of Medical Psychology, Faculté de Medecine, University of Paris, Paris, France (Dr. Pichot).

Arch Gen Psychiatry. 1967;16(2):146-151. doi:10.1001/archpsyc.1967.01730200014003

DIAGNOSTIC classification of psychiatric patients must be based primarily on description of clinical syndromes, since definite etiological bases and the relevance of much historical data are still undetermined. Psychiatric rating scales can be conceived as mechanisms for describing, in form amenable to further quantitative evaluation, the symptoms and signs upon which psychiatric diagnoses have traditionally been based. During the last decade several rating scales have been widely used in psychiatric research, primarily to increase objectivity in evaluating the therapeutic efficacy of drug treatments.1-4 The consequent availability of large collections of symptom and behavior ratings has made it possible to derive empirically a structural model representing major dimensions of clinical phenomena presented by hospitalized psychiatric patients.

The Brief Psychiatric Rating Scale (BPRS) was developed to provide quantitative representation of important symptoms and signs on unitary 7-point scales.4 Although the

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