Abstract

Tankersley has provided an interesting collection of data about various groups of antisocial individuals. Is this a paper about the moral reasoning of psychopaths, or is it an attempt to address a philosophical question—whether moral behavior is primarily driven by emotions (moral sentimentalism) or by reasons (moral rationalism)—empirically? I think it attempts a little of both, although I concentrate on the latter. The trouble with much of the literature on psychopathy is the terminological confusion, and Tankersley has not escaped this. Several disciplines, with their own languages, have an interest in antisocial individuals and use similar sounding words in different ways. It is easy to get confused. Doctors make diagnoses. Antisocial (or dissocial) personality disorder is a medical diagnosis, and has a clear, operationalized definition. By virtue of being a disorder, it must result in some impairment in the functioning of the individual. Psychopathy is a psychological construct, not a diagnosis, and attempts to measure (in a reliable and valid way, using the Psychopathy Checklist) aspects of a person's mind particularly relevant to antisocial behavior. Psychopathy and antisocial personality disorder are different approaches to the same natural phenomenon, but they are not coterminous. There are many individuals with antisocial personality disorder who are not psychopaths. There are some individuals who are psychopaths who do not have any medical diagnosis (e.g., the so-called white collar psychopath). Psychopathy is not a subset of antisocial personality disorder (pace Tankersley 2011, and Herpertz and Habermeyer 2004).