Psychotic disorders in DSM-III-R.

The authors review the important changes in the three sections of DSM-III-R that include only psychotic disorders (schizophrenia, delusional disorder, and psychotic disorders not elsewhere classified), outline the rationale for these changes, and, where available, review their empirical basis. In addition, they review two proposed changes that were not incorporated into DSM-III-R. They conclude by calling for an increasingly rigorous and data-based process of nosologic revision.