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Psychotic Disorders

  1. Lisa J. Cohen

Published Online: 30 JAN 2010

DOI: 10.1002/9780470479216.corpsy0759

Corsini Encyclopedia of Psychology

Corsini Encyclopedia of Psychology

How to Cite

Cohen, L. J. 2010. Psychotic Disorders. Corsini Encyclopedia of Psychology. 1–2.

Author Information

  1. Beth Israel Medical Center and Albert Einstein College of Medicine

Publication History

  1. Published Online: 30 JAN 2010


Psychosis refers to a breakdown in the ability to recognize external reality. Symptoms of psychosis include hallucinations, delusions, and disorganization of thought or behavior. Hallucinations entail the perception of something that is not present, and they can occur in auditory, visual, tactile, olfactory, and gustatory modes. Delusions are characterized by a fixed, false belief, and they vary across a spectrum from plausible to bizarre. Thought disorder can range in severity from subtle disorganization to total incoherence.


  • psychosis;
  • psychotic disorders;
  • antipsychotic medication;
  • neuroleptic;
  • schizophrenia