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On defining delusions.

M Spitzer1

  • 1Department of Psychology, Harvard University, Cambridge, MA 02138.

Comprehensive Psychiatry
|September 1, 1990
PubMed
Summary
This summary is machine-generated.

This study critiques the Diagnostic and Statistical Manual of Mental Disorders, 3rd Edition-Revised (DSM-III-R) definition of delusions, proposing a new clinical approach focusing on subjective certainty and incorrigibility rather than content accuracy.

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Philosophy of Mind

Background:

  • The current Diagnostic and Statistical Manual of Mental Disorders, 3rd Edition-Revised (DSM-III-R) definition of delusions presents clinical inconsistencies.
  • Historical definitions by Karl Jaspers (certainty, incorrigibility, falsity) and Kurt Schneider (delusional perception) have limitations.

Purpose of the Study:

  • To analyze the inconsistencies in the DSM-III-R definition of delusions.
  • To propose a revised definition of delusions based on clinical detection and subjective experience.

Main Methods:

  • Critical analysis of existing definitions of delusions (Jaspers, Schneider, DSM-III-R).
  • Examination of clinical practices in identifying delusional content.
  • Development of a new definitional framework.

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Main Results:

  • The third criterion of delusions (impossibility/falsity) is problematic and clinically difficult to apply.
  • Kurt Schneider's concept of delusional perception, though flawed, highlights distinct phenomena.
  • A new definition is proposed, prioritizing the subjective certainty and incorrigibility of belief content over its objective truthfulness.

Conclusions:

  • The proposed definition offers a more clinically relevant and consistent approach to understanding delusions.
  • Distinguishing between delusions (referring to external reality) and internal mental experiences is crucial.
  • This revised framework may improve the diagnosis and understanding of delusional disorders.