Psychopathic disorder in people with an intellectual disability: A valid and useful concept?

A relatively small number of people with intellectual disabilities appear to be at risk of offending (Murphy & Mason 1999). However, those who repeatedly break thelaw may attract the label of psychopathic personality disorder (PPD). A review of the literature revealed there has been little research investigating the diagnosis of PPD in people with an intellectual disability. The purpose of the present research was to develop our understanding of the disorder in people with intellectual disability. Using a structured interview, 20 consultant psychiatrists in intellectual disabilities in a region of south-east England were asked their opinions about psychopathic disorder in general and how it applies to people with an intellectual disability. In particular, they were asked about the prevalence and diagnosis of PPD in people with intellectual disabilities, difficulties associated with making the diagnosis, and how services currently managed people with an intellectual disability and a diagnosis of PPD. The findings and recommendations from this work are presented.