Classification in psychopathology: rationale, alternatives, and standards.

The elements that constitute a scientific taxonomy are outlined and presented with reference to the structure of psychopathologic categorization and diagnosis. The terminology, logic, and conceptual issues associated with clinical classification are discussed. Alternatives for the selection of substantive clinical attributes, the overall structural format into which categories are organized, and construction procedures used in developing a psychopathologic taxonomy are elaborated, as are a number of criteria for evaluating the taxonomy's utility and efficacy.