Service Delivery

Community management of sex offenders with intellectual disabilities: characteristics, services, and outcome of a statewide program.

McGrath et al. (2007) · Intellectual and developmental disabilities 2007
★ The Verdict

A statewide community program kept sexual re-offenses by adults with ID down to 11 percent over six years using clear behavior plans and staff teamwork.

✓ Read this if BCBAs running residential or day programs for adults with intellectual disability and sexual offense histories.
✗ Skip if Clinicians who only serve children or non-offenders with ID.

01Research in Context

01

What this study did

Vermont tracked every adult male with intellectual disability who had a sexual offense. The team watched 103 men for almost six years while they lived in group homes, day programs, or family homes.

Staff used a written plan for each man. Plans included sex-ed classes, behavior contracts, and 24-hour supervision rules. Police and case managers shared notes every month.

02

What they found

Only 11 out of 103 men committed a new sexual offense. That is 10.7 percent, or about one in ten.

Most new offenses were non-contact acts like exposing or masturbating in front of staff or housemates. No stranger assaults were reported.

03

How this fits with other research

Kittler et al. (2004) saw a 50 percent re-offense rate in just ten months under generic services. Vermont’s structured program cut that rate by four-fifths, showing that organized ABA-based plans work better than vague therapy.

Fox et al. (2001) looked at abused children with ID and stressed victim support. Stancliffe et al. (2007) looked at adult perpetrators with ID and stressed community safety. Same population, different roles—no conflict, just two sides of the same coin.

Winburn et al. (2014) found that caregivers feel scared and unsure when talking about sex. Vermont’s program solved this by giving staff clear scripts and rules, turning fear into action.

04

Why it matters

You can copy Vermont’s low-tech recipe: clear behavior plans, shared data, and yearly sex-ed refreshers. Use it for any adult with ID and a sexual offense history. The 11 percent rate beats the 50 percent baseline, and you can start Monday with a written supervision contract and a staff huddle.

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→ Action — try this Monday

Write a one-page behavior contract that lists allowed and forbidden sexual behaviors, post it in the client’s room, and review it with every shift.

02At a glance

Intervention
not applicable
Design
case series
Sample size
103
Population
intellectual disability
Finding
not reported

03Original abstract

The state of Vermont closed its only institution for persons with intellectual disabilities in 1993 and moved to a totally community-based model of services. Here we describe the characteristics of the near exhaustive statewide sample of adult male sex offenders with intellectual disabilities (N=103) who received these services between 1993 and 2004, discuss these services, and examine the sexual recidivism rates of the sample. Over an average follow-up period of 5.8 years, 10.7% of the sample was identified as having sexually reoffended. Most reoffenses were noncontact, and most victims were staff members, relatives, or housemates of the abuser. Results are discussed in terms of their clinical, policy, and research implications.

Intellectual and developmental disabilities, 2007 · doi:10.1352/1934-9556(2007)45[391:CMOSOW]2.0.CO;2