“…It evaluates the degree of similarity between a characteristic and a conceptual representation (i.e., construct). Thus, in relation to the construct of psychopathy, this approach can help explicate which characteristics or symptoms are salient or essential to the construct and which characteristics and symptoms should be viewed as at the boundary, or indeed, outside the boundary of the construct (Broughton, 1990). Prototypical analysis has a long pedigree; it has been found to be useful in the validation of lexical models of normal personality (Mollaret, 2009) and diagnostic criteria for various mental disorders (Blashfield & Livesley, 1991;Horowitz, Post, French, Wallis, & Siegelman, 1981;Livesley, Reiffer, Sheldon, & West, 1987;Samuel & Widiger, 2004), including personality disorder and psychopathy (Cruise, Colwell, Lyons, & Baker, 2003;Evans, Herbert, Nelson-Gray, & Gaudiano, 2002;Rogers, Duncan, Lynett, & Sewell, 1994).…”