Classification of the schizophrenias according to symptomatology: a two-factor model

J Abnorm Psychol. 1993 May;102(2):259-70. doi: 10.1037//0021-843x.102.2.259.

Abstract

Various methods of subtyping schizophrenia are briefly reviewed. It is concluded that the paranoid-nonparanoid dichotomy has been the most consistently supported both clinically and in experimental research. In an attempt to deal with its limitations, a tentative reconceptualization is proposed for schizophrenia. This new model is based on two independent factors: severity of disorder and severity of symptom. The present dimensional approach is shown to be consistent with a number of empirical findings regarding differences and associations between paranoid and nonparanoid symptomatology. The relative advantages of dimensional and categorical descriptions, as well as their combination, are presented.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Cluster Analysis
  • Female
  • Humans
  • Male
  • Psychiatric Status Rating Scales
  • Schizophrenia / classification
  • Schizophrenia / diagnosis*
  • Severity of Illness Index