Schizoaffective disorders should be divided by polarity. Much of the data on schizoaffective mania indicate that most cases are very similar in symptomatology, course, family history, and response to treatment to bipolar affective disorder patients. They may be the most severe episodic affective disorder patients. A few are probably excited schizophrenics. The data on the schizoaffective depressed patients are far more confusing. No clear data emerge from these studies, except when using biological markers of sleep and dexamethasone suppression on these patients. Future work must be concentrated on these patients.