Measures a child’s ability to perform everyday life skills, including communication, self-care, safety, and social understanding.

• Important for diagnosing intellectual disability, autism, or developmental delays.
• Based on parent and teacher questionnaires about real-life functioning.
• Conducted by a psychologist or special education evaluator.
• Common Tools: Vineland Adaptive Behavior Scales (Vineland-3), Adaptive Behavior Assessment System (ABAS-3)