The Dynamic Risk Outcome Scales (DROS) for people with mild to borderline intellectual disability: content, factorial structure, reliability, and sensitivity

Abstract

[Retraction notice: A retraction for this article was reported in Vol 24(6) of Psychology, Crime & Law (see record [rid]2018-24425-007[/rid]). The correct permission to publish the data reproduced in the tables was not obtained and therefore the article is being retracted at the request of the rights holder.] Objective: The Dynamic Risk Outcome Scales (DROS) is a Dutch multi-scale observer-rating instrument for treatment progress and outcome of individuals with mild intellectual disabilities or borderline intellectual functioning and severe challenging or offending behaviour. This article contains a description of the instrument and the first part of its psychometric evaluation with the emphasis on the suitability for measuring change. Method: The data come from routine outcome measurements during seven years for more than 600 patients in three treatment centres. The factorial structure and factorial stability of the DROS are evaluated by confirmative factor analysis. In addition, the internal reliability, test-retest reliability, and smallest detectable change of the scales are determined. Results: The hypothesized factorial structure is supported and found to be stable across repeated measurements. The scales are sufficiently reliable and sensitive to change for outcome evaluation of individual patients. Conclusion: The content and the psychometric properties make the DROS a suitable measure for individual treatment evaluation and routine outcome monitoring of its target population. (PsycInfo Database Record (c) 2022 APA, all rights reserved)