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  • 1.
    Andershed, Henrik
    et al.
    Örebro University, Department of Behavioural, Social and Legal Sciences.
    Hodgins, Sheilagh
    Tengstrom, Anders
    Convergent validity of the Youth Psychopathic Traits Inventory (YPI) - Association with the Psychopathy Checklist: Youth Version (PCL : YV)2007In: Assessment (Odessa, Fla.), ISSN 1073-1911, E-ISSN 1552-3489, Vol. 14, no 2, p. 144-154Article in journal (Refereed)
    Abstract [en]

    This study investigates the relationship between the self-report Youth Psychopathic Traits Inventory (YPI) and the clinician-rated Psychopathy Checklist: Youth Version (PCL:YV). A representative sample of 92 girls and 70 boys, 12 to 20 years of age (mean age, 17 years), who received services at a clinic for adolescents with substance misuse problems, was studied. Moderate correlations (r =30-.51) were found between conceptually corresponding YPI and PCL: YV factor scores among both boys and girls, whereas correlations between individual subscales of the YPI and items of the PCL: YV were not as consistent. A cross-tabulation of groupings based on the three-factor models of the two instruments largely supported the categorical convergent validity of the YPI, particularly for low and high scorers. Although more studies with larger samples are needed, results indicate that the YPI is a cost-effective measure of psychopathic traits in adolescents in research settings.

  • 2.
    Colins, Olivier F.
    et al.
    Medical Center (Curium LUMC ), Leiden Univ, Leiden, Netherlands.
    Bijttebier, Patricia
    University Louvain, Louvain, Belgium.
    Broekaert, Eric
    Ghent University, Ghent, Belgium.
    Andershed, Henrik
    Örebro University, School of Law, Psychology and Social Work.
    Psychopathic-like traits among detained female adolescents: reliability and validity of the antisocial process screening device and the youth psychopathic traits inventory2014In: Assessment (Odessa, Fla.), ISSN 1073-1911, E-ISSN 1552-3489, Vol. 21, no 2, p. 195-209Article in journal (Refereed)
    Abstract [en]

    This study examined the factor structure, reliability, and validity of the Antisocial Process Screening Device-Self-Report (APSD-SR), the Youth Psychopathic Traits Inventory (YPI), and the YPI-Short Version (YPI-SV) in detained female adolescents aged 12 to 17 years. The proposed three-factor structure of the YPI and YPI-SV was replicated, whereas the proposed three-factor structure of the APSD-SR or alternate models did not yield adequate fit. Overall, reliability indices for the YPI and YPI-SV were higher than those reported for the APSD-SR. APSD-SR and YPI scales were positively related with each other, except the affective dimensions of the instruments. All questionnaires showed good criterion validity but the YPI's factor structure and reliability was superior to the APSD-SR. This superiority is not because of the larger number of items in the YPI, because we also demonstrated that the factor structure and reliability of the YPI-SV was better than that of the APSD-SR.

  • 3.
    Colins, Olivier F.
    et al.
    Örebro University, School of Law, Psychology and Social Work. Leiden University Medical Center, Leiden, Netherlands.
    Fanti, Kostas
    University of Cyprus, Nicosia, Cyprus.
    Larsson, Henrik
    Karolinska Institutet, Solna, Sweden.
    Andershed, Henrik
    Örebro University, School of Law, Psychology and Social Work.
    Psychopathic Traits in Early Childhood: Further Validation of the Child Problematic Traits Inventory2017In: Assessment (Odessa, Fla.), ISSN 1073-1911, E-ISSN 1552-3489, Vol. 24, no 5, p. 602-614Article in journal (Refereed)
    Abstract [en]

    The aim was to further test the reliability and validity of a newly developed instrument designed to assess psychopathic personality traits in children, the Child Problematic Traits Inventory (CPTI). Data from the Preschool Twin Study in Sweden were used, a national general population study of 5-year-old twins (n = 1,188, 50.3% girls). Both preschool teachers and parents were used as informants. Confirmatory factor analysis replicated the intended three-factorial structure of the 28 items of the CPTI. Overall, our findings demonstrated good internal consistency and convergent validity, with all the teacher-rated CPTI scores being associated with teacher and parent ratings of externalizing psychopathology, aggressive behavior, fearlessness, and prosocial peer involvement. In conclusion, the CPTI hold promise as a teacher-rated tool for assessing psychopathic traits in childhood, though more research is needed to see if these findings can be generalized to other countries, settings, and older children.

  • 4.
    Colins, Olivier F.
    et al.
    Ghent University, Gent, Belgium; Leiden University Medical Center, Leiden, Netherlands.
    Roetman, Peter J.
    Leiden University Medical Center, Leiden, Netherlands.
    Lopez-Romero, Laura
    Örebro University, Örebro, Sweden; University of Santiago de Compostela, Santiago de Compostela, Spain.
    Andershed, Henrik
    Örebro University, School of Law, Psychology and Social Work.
    Assessing Psychopathic Traits Among Children: The First Validation Study of the Child Problematic Traits Inventory in a Clinical Sample2019In: Assessment (Odessa, Fla.), ISSN 1073-1911, E-ISSN 1552-3489, article id 1073191119832654Article in journal (Refereed)
    Abstract [en]

    This is the first study that tested the psychometric properties of the Child Problematic Traits Inventory (CPTI) in clinic-referred children (ages 6-13 years). Teachers ( N = 159) and parents ( N = 173) completed the CPTI and various other measures. Confirmatory factor analyses supported the CPTI's three-factor structure when teachers and parents rated the 28 CPTI items. Teacher- and parent-reported CPTI scores showed the expected relations with external correlates (e.g., conduct problems and proactive aggression). Crucially, the validity of the CPTI scores was also supported across informants (i.e., when linking teacher-reported CPTI scores to parent-reported external correlates, and vice versa) and across methods (i.e., regardless if a questionnaire or a diagnostic interview was used to measure external correlates). We conclude that the CPTI holds promise as a research tool for assessing psychopathic traits in clinic-referred children. Until our findings have been replicated and extended, the CPTI should not be used for clinical decision making.

  • 5.
    Douglas, Kevin S.
    et al.
    Simon Fraser University, Canada; Mid-Sweden University, Sweden.
    Strand, Susanne
    Sundsvall Forensic Psychiatric Hospital, Sweden.
    Belfrage, Henrik
    Mid-Sweden University, Sundsvall Forensic Psychiatric Hospital, Sweden.
    Fransson, Göran
    Sundsvall Forensic Psychiatric Hospital, Sweden.
    Levander, Sten
    University of Lund, Sweden.
    Reliability and validity evaluation of the psychopathy checklist: Screening version (PCL : SV) in Swedish correctional and forensic psychiatric samples2005In: Assessment (Odessa, Fla.), ISSN 1073-1911, E-ISSN 1552-3489, Vol. 12, no 2, p. 145-161Article in journal (Refereed)
    Abstract [en]

    This study evaluated the structural reliability, construct-related validity, and cultural validity generalization of the Hare Psychopathy Checklist: Screening Version (PCL:SV) in a sample of more than 560 male and female Swedish forensic psychiatric treatment patients, forensic evaluation patients, and criminal offenders. Structural reliability was excellent for most indices. PCL:SV scores were higher for males than females for total and Part 1 scores (interpersonal/affective features) but not for Part 2 (behavioral features). With some exceptions, PCL:SV scores were meaningfully related to aggression to others, a measure of risk for violence, substance use problems, personality disorder (positive), and psychosis (negative). Correlations between PCL:SV and aggression were larger for females than males, although the difference was smaller when personality disorder was held constant. The structural reliability and pattern of validity coefficients were comparable in these Swedish samples to other non-North American samples. Implications for the cross-cultural manifestation and correlates of psychopathy are discussed.

  • 6.
    Fossati, Andrea
    et al.
    LUMSA University, Rome, Italy; San Raffaele Hospital, Milan, Italy.
    Somma, Antonella
    LUMSA University, Rome, Italy; San Raffaele Hospital, Milan, Italy.
    Borroni, Serena
    San Raffaele Hospital, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy.
    Frera, Fernanda
    San Raffaele Hospital, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy.
    Maffei, Cesare
    San Raffaele Hospital, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy.
    Andershed, Henrik
    Örebro University, School of Law, Psychology and Social Work.
    The Factor Structure and Construct Validity of the Short Version of the Youth Psychopathic Traits Inventory in Two Independent Samples of Nonreferred Adolescents2016In: Assessment (Odessa, Fla.), ISSN 1073-1911, E-ISSN 1552-3489, Vol. 23, no 6, p. 683-697Article in journal (Refereed)
    Abstract [en]

    To assess the internal consistency, factor structure, and construct validity of the Italian translation of the Youth Psychopathic Traits Inventory-Short Version (YPI-S), both the YPI-S and its full version, the YPI, as well as self-reports of delinquency, aggression, and Big Five domains, were administered to two independent samples (N = 868 and N = 881) of Italian community, nonreferred adolescents. The internal consistency of the YPI-S was adequate, and confirmatory factor analyses showed a good fit of the theoretical three-factor model of the YPI-S in both samples. Hierarchical regression models suggested the same pattern of associations with self-report measures of delinquency and aggression for the YPI-S and YPI, although the YPI was a better predictor of Big Five domains than the YPI-S. The findings support the internal consistency, factor validity, and construct validity of the YPI-S.

  • 7.
    Patrick, C. J.
    et al.
    Florida State University, Tallahassee FL, USA.
    Kramer, Mark
    University of Minnesota, Minneapolis MN, USA.
    Tellegen, A
    University of Minnesota, Minneapolis MN, USA.
    Verona, E
    University of Illinois at Urbana-Champaign, IL, USA.
    Kaemmer, B. A.
    University of Minnesota, Minneapolis MN, USA.
    Development and Preliminary Validation of a Simplified-Wording Form of the Multidimensional Personality Questionnaire2013In: Assessment (Odessa, Fla.), ISSN 1073-1911, E-ISSN 1552-3489, Vol. 20, no 4, p. 405-418Article in journal (Refereed)
    Abstract [en]

    The Multidimensional Personality Questionnaire (MPQ) assesses a range of personality characteristics pertaining to affective and interpersonal style, behavioral restraint versus disinhibition, and capacity for sensory and imaginal engagement. Its 11 lower order trait scales map onto 3 higher order factors that reflect temperament dimensions. Its content and measurement properties have made the MPQ useful for elucidating constructs relevant to normal and abnormal behavior and investigating their neurobiological underpinnings. However, a barrier to its use in certain populations is the reading difficulty of some MPQ items. We describe efforts to develop a simplified-wording form, the MPQ-SF, composed of items readable at or below the seventh grade level (with most below sixth grade). Simplified-wording items demonstrated high convergence with original-wording items, and resulting trait scales showed adequate internal consistencies and appropriate higher order structure. The availability of a simplified version expands the potential utility of the MPQ to a wider range of samples.

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