The Adaptive Behavior Diagnostic Scale (ABDS) is an interview-based rating scale that assesses the adaptive behaviour of individuals between the ages of 2 through 21 years. The primary function of the ABDS is to establish the presence and the magnitude of adaptive behaviour deficits. The ABDS scores are compatible with state and federal special education classification systems and consistent with the DSM-V and American Association on Intellectual and Developmental Disorders (AAIDD) definitions of intellectual disability. The ABDS may be used to assess the adaptive behaviour of individuals with or suspected of having an intellectual disability, autism spectrum disorder, learning disabilities, mental or behavioural health condition or other similar concerns.
The test yields reliable and valid scores for three adaptive behaviour domains (Conceptual, Social, Practical), composed of 50 items each. Specific skill areas measured in the three domains and the overall composite score are described below:
1. Conceptual Domain: Language, reading, writing, math, reasoning, knowledge, and memory.
2. Social Domain: Empathy, social judgment, gullibility, communication skills, the ability to make and retain friendships, and similar interpersonal capabilities.
3. Practical Domain: Self-management of personal care, home living, community use, job responsibilities, money management, recreation, and organizing school and work tasks.
4. Adaptive Behavior Index: A combination of the three-domain scores results in a composite score called the Adaptive Behavior Index. This composite is the most reliable score that is generated from administering the ABDS.