The Vineland Adaptive Behavior Scale is a psychometric instrument used in child and adolescent psychiatry and clinical psychology. It is used especially in the assessment of individuals with an intellectual disability, a pervasive developmental disorder, and other types of developmental delays. The Vineland Adaptive Behavior Scale is a psychometric instrument used in child and adolescent psychiatry and clinical psychology. It is used especially in the assessment of individuals with an intellectual disability, a pervasive developmental disorder, and other types of developmental delays.