BackgroundThe present study examined the psychometric properties of the Dynamic Risk Outcome Scales (DROS), an instrument developed to measure dynamic risk factors in individuals with mild intellectual disabilities or borderline intellectual functioning (MID‐BIF) and externalizing (including offending‐like) behaviour problems.MethodThe sample consisted of 606 clients (86% male) from inpatient treatment wards at a facility for individuals with MID‐BIF and externalizing behaviour problems.ResultsThe DROS showed an acceptable factor structure, good internal consistency, significant test–retest reliability and fair to excellent inter‐rater reliabilities for most subscales and total score. Compared to the Adult Behavior Checklist (ABCL; Achenbach & Rescorla, 2003 Manual for the ASEBA adult forms and profiles. Burlington, VT: University of Vermont, Research Center for Children, Youth, & Families), the DROS showed convergent and divergent validity, concurrent and longitudinal validity.ConclusionsThe DROS is a reliable and valid instrument to measure dynamic risk factors in clients with MID‐BIF. Future research on the DROS will focus on the assessment of recidivism and the inclusion of internalizing problems.
Background
The dynamic risk outcome scales (DROS) was developed to assess treatment progress of clients with mild intellectual disability or borderline intellectual functioning using dynamic risk factors. We studied the predictive value of the DROS on various classifications and severity levels of recidivism.
Method
Data of 250 forensic clients with intellectual disabilities were linked to recidivism data from the Judicial Information Service in the Netherlands. Receiver operating characteristics (ROC) analyses were used to determine the predictive values.
Results
The DROS total score could not significantly predict recidivism. A DROS recidivism subscale predicted general, violent and other recidivism. These predictive values were comparable to those of a Dutch tool validated for risk assessment in the general forensic population.
Conclusions
The DROS recidivism subscale predicted various classifications of recidivism better than chance. At present, the DROS appears to have no added value beyond the HKT‐30 for the purpose of risk assessment.
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