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    Predictive validity of the PCL-R in offenders with intellectual disability in a high secure hospital setting: Institutional aggression

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    Author
    Morrissey, Catrin
    Hogue, Todd E.
    Mooney, Paul
    Allen, Clare
    Johnston, Susan J.
    Keyword
    Intellectual disability
    Mentally ill offenders
    High security facilities
    Psychopathology
    Checklist
    Risk assessment
    Violence
    Date
    2007
    
    Metadata
    Show full item record
    DOI
    10.1080/08990220601116345
    Publisher's URL
    http://www.tandfonline.com/doi/full/10.1080/08990220601116345
    Abstract
    Psychopathy has emerged as one of the constructs most predictive of violence risk in the forensic field. The Psychopathy Checklist-Revised (PCL-R) has previously been found to have acceptable reliability and validity in a sample of offenders with intellectual disability, but its predictive validity in this group has yet to be established. This prospective study examined the relative ability of the PCL-R and two other instruments, the Historical Clinical Risk-20 (HCR-20) and the Emotional Problem Scales' Behaviour Ratings Scale, to predict officially recorded institutional aggression. A sample of 60 offenders with intellectual disability in a high security forensic psychiatric setting was followed up for a period of 12 months. The PCL-R 20-item total, the PCL-R 13-item total, and PCL-R Factor 1 and Factor 2 scores did not significantly predict any type of aggressive behaviour. In contrast, the two more clinically based measures significantly predicted both interpersonal physical and verbal/property aggression. A primary justification for using the PCL-R in forensic settings is the evidence for its association with violence. Further studies examining the relationship between psychopathy, aggression, and violent recidivism in broader samples of offenders with ID are therefore imperative.
    Citation
    Morrissey, C., Hogue, T. E., Mooney, P., Allen, C., Johnston, S. J., Hollin, C., Lindsay, W. R. & Taylor, J. L. (2007). Predictive validity of the PCL-R in offenders with intellectual disability in a high secure hospital setting: Institutional aggression. Journal of Forensic Psychiatry and Psychology, 18 (1), pp.1-15.
    Type
    Article
    URI
    http://hdl.handle.net/20.500.12904/10643
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    Intellectual Disabilities
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