A selective review of research on offenders with developmental disabilities: assessment and treatment

Intellectual disability screening in women prisoners: preliminary evaluation

PURPOSE

- The purpose of this paper is to evaluate a new Intellectual Disability (ID) screening service within a women's prison in England.

DESIGN/METHODOLOGY/APPROACH

- Analysis of prisoner records was carried out to establish characteristics of women entering the prison, rates of screening completion and time intervals for all stages of the assessment pathway.

FINDINGS

- In total 198 women were received into prison and underwent 202 ID screens. Nine out of ten women completed a screen, almost all on arrival or very soon afterwards. There were 23 referrals for secondary assessment but only four were completed. Most of the women identified for additional screening left the prison before this could be achieved.

ORIGINALITY/VALUE

- This evaluation is the first to show that preliminary screening for ID is feasible in prison. This screening alone is useful for prisons to make the kind of reasonable adjustment required of public bodies by the Equality Act. However, its value is constrained unless resources are also dedicated to the kind of additional screening which might lead to definitive diagnosis and care planning for intellectual disability. This model of assessment would be of considerable value in establishing prisoners at risk by virtue of different levels of intellectual disability and could be used to provide more reliable and routine estimates of prevalence contributing to overall better service planning.

Sexual abuse involving children with an intellectual disability (ID): a narrative review

The current paper provides a narrative review of the literature on sexual abuse, involving children with Intellectual Disability (ID). The thirteen articles that were found and met our criteria vary in their definitions of sexual abuse and in how ID was determined. Still, they do paint a general picture concerning (1) the extent of sexual abuse, (2) the nature of the sexual abuse, and (3) the institutional reactions following sexual abuse of children with ID. Our findings confirm the greater vulnerability of children with ID to become involved in sexual abuse both as a victim and as a perpetrator, and we discuss ways to help strengthening prevention and intervention methods. Nevertheless, more research is needed, as it is still a rather unexplored topic, which is striking in light of the high vulnerability of this group.

Differences between juvenile offenders with and without intellectual disability in offense type and risk factors

The present study aimed to examine differences between American juvenile offenders with and without intellectual disability (ID) in offense type and risk factors. The sample consisted of adolescents with ID (n=102) and without ID (n=526) who appeared before the courts for a criminal act and for whom the Washington State Juvenile Court Assessment (WSJCA) was completed. Results showed that adolescents with ID had committed more offenses against persons compared to adolescents without ID. Few differences in risk factors were found between juvenile offenders with and without ID in the domains of school, family and use of free time. Juvenile offenders without ID more often had problems in the relationship and alcohol/drugs domain, whereas juveniles with ID more often experienced problems in the domains of attitude, aggression and skills.

Are we there yet? Screening processes for intellectual and developmental disabilities in jail settings

Early identification of intellectual and developmental disabilities in persons in the criminal justice system is essential to protect their rights during arrest and trial, ensure safety when incarcerated, and maximize the opportunities to receive services while incarcerated and postrelease. Using telephone interviews of jail administrators (N=80) in 1 state, this study examined how people with intellectual and developmental disabilities were identified in jails. Findings indicated that administrators varied widely in awareness of individuals with intellectual and developmental disabilities in their jails. Few jails (6%) used formal screening instruments for intellectual and developmental disabilities, others relied on officer observation and self-report (53%), and some provided no screening at all; in addition, officers received little training in this regard. Findings suggest that few jails are operationalizing best-practice screening processes for intellectual and developmental disabilities.

Exploratory factor analysis and convergent validity of the Dundee Provocation Inventory

Background The prevalence and consequences of anger and aggression in people with intellectual disability (ID) are of great concern. It is essential that appropriate assessment tools are developed to aid formulation of treatments and to evaluate progress and outcomes. Method This study evaluates the Dundee Provocation Inventory (DPI), a 20-item assessment measure for anger provocation. A group of 114 participants were administered the DPI, and 62 of these were also administered the Novaco Anger Scale (NAS) and NAS Provocation Inventory (NAS-PI), two well-validated measures. Results Preliminary analysis revealed that the DPI correlated significantly with the NAS (r = .57) and NAS-PI (r = .77). The DPI had high internal consistency (alpha = .91) and moderate to high inter-item and item-to-total score correlations. Factor analysis revealed a 5-factor solution which accounted for 63% of the variance and was most easily interpreted. Conclusion The analysis suggests that the DPI is a suitable tool for assessing anger in people with ID. Further replication of the factor structure would be valuable.

Forensic aspects in people with intellectual disabilities

PURPOSE OF REVIEW

The past few years have seen a growth in research of forensic issues relating to people with intellectual disabilities. This review examines a broad spectrum covering 2005 and 2006, for which articles are already available. Given the diversity of publications, reference will also be made to some of the main articles of 2004 to provide a context.

RECENT FINDINGS

We are now at the stage where people are questioning the existing forensic psychiatry evidence base for people with intellectual disabilities. This review examines the assessment and treatment of three different groups, that is, fire setters, sexual offenders and those with problems of anger and aggression along with service outcome research, the criminal justice system, and a round up of other related research.

SUMMARY

The growth of research in this area has aided the development of assessment and treatment instruments and treatment models for people with intellectual disabilities. This has helped to highlight the specialist and complex nature of this group. The review also looks at services from the point of delivery and the difficulty in research methodology and quantifying outcomes that take into account a changing society and current health inequalities.