Affective symptoms, schizophrenia, and the conceptual ambiguity of postpsychotic depression.

McGlashan and Carpenter (1979) have critiqued our article (Goplerud and Depue 1978), in which we suggested that postpsychotic depression and bipolar depressive disorder may well be related. Their critique has many problems and, most importantly, raises new ambiguities concerning the definition of postpsychotic depression. Therefore, we have attempted to clarify the issues their discussion raises.