Intelligence tests and adaptive behavior scales measure vital aspects of the multidimensional nature of human functioning. Assessment of each is a required component in the diagnosis or identification of intellectual disability, and both are frequently used conjointly in the assessment and identification of other developmental disabilities. The…

The problem behaviors of self-injury, aggression, and stereotypies are among the most troubling and difficult to treat behaviors in individuals with intellectual disability (ID). One factor that has been implicated in the etiology and maintenance of problem behaviors in individuals with ID is adaptive skills deficits. However, the nature of the…