NDLI: Understanding the Psychopathic Personality Inventory (PPI) in terms of the unidimensionality, orthogonality, and construct validity of PPI-I and -II.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Neumann, Craig S. Uzieblo, Katarzyna Crombez, Geert Hare, Robert D.
Description	Country affiliation: United States Author Affiliation: Neumann CS ( Department of Psychology, University of North, TX 76203, USA. craig.neumann@unt.edu)
Abstract	Comments on an article by Marcus et al. (see record 2011-23134-001). Marcus et al. (this issue) hold that PPI-I and PPI-II are generally orthogonal (uncorrelated). Examination of the primary PPI scales calls this into question. Specifically, the scales that make up Psychopathic Personality Inventory (PPI)-I and PPI-II are differentially correlated in offenders (Neumann et al., 2008) and college students (as reported in Lilienfeld, 1990, final sample). This pattern of correlations indicates that the socalled orthogonal association between PPI-I and PPI-II may be attributable to a statistical 'washout' effect, rather than zero correlations across scales. The scales that make up PPI-I and PPI-II may also be correlated differentially with external correlates, rendering interpretation of PPI-I and PPI-II associations with such correlates ambiguous. The overlap of PPI scale scores among forensic and nonforensic samples also is problematic, particularly for the PPI-I scales.
File Format	HTM / HTML
ISSN	19492715
Issue Number	1
Volume Number	4
e-ISSN	19492723
Journal	Personality Disorders: Theory, Research, and Treatment
Language	English
Publisher	American Psychological Association
Publisher Date	2013-01-01
Publisher Place	United States
Access Restriction	Subscribed
Subject Keyword	Discipline Psychology Antisocial Personality Disorder Psychology Impulsive Behavior Models, Psychological Personality Inventory Statistics & Numerical Data Social Dominance Humans Comment Journal Article
Content Type	Text
Resource Type	Article
Subject	Clinical Psychology Psychiatry and Mental Health

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