+Psychology (Graduate): Mental Health Classifications

If you read older articles especially, not only are the names of problems different, but the definitions differ, even with the same names. Therefore, studies are looking at different populations. For instance, Major Depressive Disorder, With melancholic features, may be called:

DSM-I (1952): Psychotic depressive reaction
DSM-I Special Supplement (1965): Manic-depressive psychosis, depressed type
   Includes Endogenous depression

DSM-II (1968): Involutional melancholia

DSM-III (1980): Manic-depressive illness, depressed type

DSM-III-R: (1987): Major depression, recurrent

DSM-IV: Recurrent Depressive Disorder

DSM-IV-R: Major Depressive Disorder, recurrent

DSM5: Major Depressive Disorder, With melancholic features