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Related Experiment Videos

Offenders with intellectual disability: a prospective comparative study.

P Barron1, A Hassiotis, J Banes

  • 1Care Principles Limited, Linden House, Market Weighton, East Yorkshire YO43 4LA, UK. phil.barron@lindenhouse.careprinciples.com

Journal of Intellectual Disability Research : JIDR
|December 17, 2003
PubMed
Summary
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Childhood risk factors and clinical and service outcomes in adulthood in people with intellectual disabilities - CORRIGENDUM.

BJPsych open·2025

Intellectually disabled offenders (IDOs) often begin offending young, with sex offenses and arson being common. Therapeutic interventions showed limited efficacy, and about half of IDOs re-offended within ten months.

Area of Science:

  • Forensic Psychology
  • Intellectual Disability Research
  • Criminology

Background:

  • Intellectually disabled offenders (IDOs) are an under-recognized group requiring specialized, long-term interventions.
  • Limited research exists on the specific needs and outcomes for IDOs within the criminal justice system.

Purpose of the Study:

  • To investigate the characteristics of intellectually disabled offenders.
  • To identify factors influencing outcomes, including recidivism and therapeutic intervention effectiveness.
  • To compare outcomes between IDOs accessing specialist versus non-specialist services.

Main Methods:

  • Prospective study of 61 intellectually disabled offenders.
  • Assessment at baseline and after a 10-month follow-up period.

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  • Comparison of recidivism rates and impact of interventions.

    • Main Results:

    • IDO group exhibited early onset of offending, multiple offenses, and overrepresentation of sex offending and arson.
    • Participants from non-specialist services had higher IQs and less community support contact.
    • Limited evidence for therapeutic intervention efficacy; interventions were often non-specific.
    • Approximately 50% of the sample re-offended within the follow-up period.

    Conclusions:

    • Intellectually disabled offenders present unique challenges within the criminal justice system.
    • Current therapeutic interventions appear to have limited effectiveness for this population.
    • Further research is needed to develop targeted and effective interventions for IDOs.