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Schizoaffective Disorder

  1. Ivy F. Tso,
  2. Jinsoo Chun,
  3. Patricia J. Deldin

Published Online: 30 JAN 2010

DOI: 10.1002/9780470479216.corpsy0818

Corsini Encyclopedia of Psychology

Corsini Encyclopedia of Psychology

How to Cite

Tso, I. F., Chun, J. and Deldin, P. J. 2010. Schizoaffective Disorder. Corsini Encyclopedia of Psychology. 1–3.

Author Information

  1. University of Michigan

Publication History

  1. Published Online: 30 JAN 2010


Schizoaffective disorder was first described in the literature by Kasanin in 1933, referring to a group of patients in whom both psychotic (“schizo”) and mood (“affective”) symptoms are prominent features. A formal diagnosis of schizoaffective disorder requires that (1) a mood episode (major depressive, manic, or mixed) co-occurs with active schizophrenia symptoms; (2) hallucinations or delusions have occurred for at least 2 weeks in the absence of prominent mood symptoms; (3) the mood symptoms are present for a substantial portion of the total active and residual phases of schizophrenia; and (4) the symptoms are not related to the direct physiological effects of a substance or a general medical condition. Schizoaffective disorder can be further broken down into two subtypes: depressive type (if the mood component consists of only major depressive episodes) and bipolar type (if a manic or mixed episode is part of the mood component). Because loss of interest or pleasure also resembles another common symptom of schizophrenia (i.e., anhedonia), the other essential feature of a major depressive episode, pervasive depressive mood, must be present in the depressive type of schizoaffective disorder.


  • affective disorders;
  • bipolar disorder;
  • depression;
  • schizophrenia;
  • schizophrenia-spectrum disorder