Harmful Dysfunction:A concept developed by Wakefield that defines a mental disorder as a condition that causes significant harm or distress to an individual and represents a dysfunction in the natural, evolved mechanisms of the mind.
Diagnostic and Statistical Manual of Mental Disorders (DSM): The primary manual used by mental health professionals in the United States to diagnose and classify mental disorders, which has been influenced by Wakefield's work on the concept of harmful dysfunction.
Evolutionary Psychiatry: An approach to understanding mental disorders that considers the evolutionary origins and adaptive functions of the mind, which is an area of research that Wakefield has contributed to.