This report provides evidence for the reliability, validity, and developmental course of the psychopathic personality traits (factors) of Fearless Dominance (FD) and Impulsive Antisociality (IA) as assessed by items from the Multidimensional Personality Questionnaire (MPQ; Patrick, Curtin, Tellegen, 2002). In Study 1, MPQ-based measures of FD and IA were strongly correlated with their corresponding composite scores from the Psychopathic Personality Inventory-Revised (Lilienfeld Widows, 2005). In Study 2, FD and IA had relatively distinct associations with measures of normal and maladaptive personality traits. In Study 3, FD and IA had substantial retest coefficients during the transition to adulthood, and both traits showed average declines with an especially substantial drop in IA. In Study 4, FD and IA were correlated with measures of internalizing and externalizing problems in ways consistent with previous research and theory. Collectively, these results provide important information about the assessment of FD and IA.
Bibliographical noteFunding Information:
The Michigan State University Graduate School provided funds to purchase the PPI–R protocols administered in Study 1. The ongoing panel study used in Studies 3 and 4 is currently supported by grants from the National Institute of Child Health and Human Development, the National Institute on Drug Abuse, and the National Institute of Mental Health (HD047573, HD051746, and MH051361, respectively). Support for earlier years of the study also came from multiple sources including the National Institute of Mental Health (MH00567, MH19734, MH43270, MH59355, MH62989, and MH48165), the National Institute on Drug Abuse (DA05347), the National Institute of Child Health and Human Development (HD027724), the Bureau of Maternal and Child Health (MCJ–109572), and the MacArthur Foundation Research Network on Successful Adolescent Development Among Youth in High-Risk Settings. We thank Christopher Patrick and Stephen Benning for helpful comments concerning the PPI–R.