title: Examining the reliability and validity of an abbreviated Psychopathic Personality Inventory-Revised (PPI-R) in four samples.
abstract: A recently developed 40-item short-form of the Psychopathic Personality Inventory-Revised (PPI-R; Lilienfeld & Widows, 2005) has shown considerable promise as an alternative to the long-form of the instrument (Eisenbarth, Lilienfeld, & Yarkoni, 2015). Beyond the initial construction of the short-form, however, Eisenbarth et al. only evaluated a small number of external correlates in a German college student sample. In this study, we evaluate the internal consistency of the short-form scales in 4 samples previously administered the full PPI-R (3 U.S. college student samples and 1 U.S. forensic psychiatric inpatient sample) and examine a wide range of external correlates to compare the nomological nets of the short- and long-forms. Across all 4 samples, correlations between each short-form scale and its corresponding long-form scale were uniformly high (all rs > .75). In terms of external correlates, the pattern of associations was exceedingly similar, for the short-form and long-form composites with a largely trivial reduction in effect size. Collectively, our findings offer considerable support for the utility of this new short-form as a substitute for the full PPI-R. (PsycINFO Database Record
authors.affiliation: Department of Psychology.
authors.forename: Jared R
authors.initials: JR
authors.lastname: Ruchensky
authors.affiliation: Department of Psychology.
authors.forename: John F
authors.initials: JF
authors.lastname: Edens
authors.affiliation: Department of Psychology.
authors.forename: M Brent
authors.initials: MB
authors.lastname: Donnellan
authors.affiliation: Health Outcomes Research, Kantar Health.
authors.forename: Edward A
authors.initials: EA
authors.lastname: Witt
mesh_terms: D000328:Adult; D000987:Antisocial Personality Disorder / Q000175:diagnosis* / Q000523:psychology; D057237:Criminals / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D010555:Personality Inventory; D015203:Reproducibility of Results; D012559:Schizophrenia; D057566:Self Report; D013334:Students / Q000523:psychology*; D055815:Young Adult