The Vineland Adaptive Behavior Scales, Third Edition (Vineland-3) is an individually administered scale of adaptive behavior for individuals of any age. The Vineland-3 is a well-researched and validated instrument that historically has been the most widely used measure of adaptive functioning. Adaptive behavior describes an individual’s daily functioning, or the ability to adapt to his or her environment. It includes the ability to perform in social and personal realms. Adaptive behavior is related to age in that as one ages, a person’s ability to adapt becomes more sophisticated. It is also culturally relevant in that it is judged by the standards of those who live and work with the individual. Adaptive behavior is not defined by what an individual can ultimately do but by what ...