Psychiatric patients present with a variety of kinds of difficulties. One way to coherently address this diversity is to recognize and use distinct methods of psychiatric reasoning for particular kinds of difficulties (Ghaemi, 2003, McHugh, 2005, McHugh and Slavney, 1998). One of the most intuitive distinctions in reasoning is between that for psychiatric conditions that manifest primarily with involuntary symptoms and that for conditions that manifest primarily as dysfunctional behaviors.
