Psychological assessment procedures for sex offenders with intellectual and developmental disabilities

Lesley R. Steptoe, Amanda M. Michie

Research output: Chapter in Book/Report/Conference proceedingChapter


This chapter considers the important variables in the assessment of sexual offenders with intellectual developmental disabilities (IDD). It aims to outline and evaluate the available psychometric assessments commonly used when assessing psychological constructs with sexual offenders with IDD. The chapter provides a brief overview of some psychometric principles. A growing body of empirical studies have identified several factors that appear to be crucial ingredients in the underpinnings of sexual abuse. This has led to a variety of empirical measures for the assessment of sexual offenders with psychometric assessments being plentiful to assess a number of constructs. The multiphasic sex inventory is designed to assess psychosocial aspects of the sex offender's presentation and shows good psychometric and risk assessment properties. There are a number of shared characteristics within actuarial risk assessment instruments, for example they represent highly structured risk assessment scales using combinations of empirically determined and thoroughly operationalized predictor variables which correlate with sexual recidivism.
Original languageEnglish
Title of host publicationThe Wiley handbook on what works for offenders with intellectual and developmental disabilities
Subtitle of host publicationan evidence‐based approach to theory, assessment, and treatment
EditorsWilliam R. Lindsay, Leam A. Craig, Dorothy Griffiths
Place of PublicationChichester
PublisherJohn Wiley and Sons Ltd
Number of pages34
ISBN (Electronic)9781119316268
ISBN (Print)9781119316251, 9781119316237
Publication statusPublished - 29 Nov 2019


  • Actuarial risk assessment instrument
  • Intellectual developmental disability
  • Multiphasic sex inventory
  • Psychological assessment procedure
  • Psychometric assessment
  • Risk assessment scale
  • Sex offender
  • Sexual recidivism


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