The Mismeasure of Psychopathy: A Commentary on Boddy’s PM-MRV
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Boddy and his colleagues have published several articles on “corporate psychopathy” using what they refer to as a Psychopathy Measure—Management Research Version (PM-MRV). They based this measure on the items that comprise the Interpersonal and Affective dimensions (Factor 1) of the Hare Psychopathy Checklist-Revised (PCL-R), a widely used copyrighted and controlled instrument. The PM-MRV not only misspecifies the construct of psychopathy, but also serves as an example of the problems associated with an attempt to form a “new” scale by adapting items from a proprietary scale. The PCL-R measures a superordinate construct underpinned by four correlated dimensions or first-order factors, not just the two in the PM-MRV. The other two dimensions are Lifestyle and Antisocial, which together form Factor 2 of the PCL-R. As defined by the PCL-R, psychopathy requires high scores on both Factor 1 and Factor 2. Lack of validity aside, even if the PM-MRV were to be a useful measure of Factor 1, it would not discriminate between psychopathy and other “dark personalities,” such as Machiavellianism and narcissism, which, along with psychopathy, form the Dark Triad. This lack of discrimination stems from the fact that each of these personalities shares features measured by Factor 1 and, by implication, by the PM-MRV. Research findings based on the PM-MRV may have some meaning with respect to dark personalities in general, but their relevance to psychopathy, as measured with the PCL-R, is tenuous at best.
KeywordsCorporate psychopathy Measurement issues PM-MRV PCL-R Dark Triad Corporate misbehavior
Preparation of this article was facilitated by a grant to Robert Hare by the Donner Foundation. We thank Kylie Neufeld for her help in preparing this manuscript.
Robert Hare receives royalties from the sale of the PCL-R and its derivatives. He also is a co-author of the B-Scan 360 and the SRP-4.
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