Positive Behavior Support refers to research-based strategies and tools that are used to increase quality of life and decrease problem behavior by changing social interactions and settings that tend to be associated with problematic behavior. Positive behavior support evolved from the field of applied behavior analysis (ABA) and shares foundational principles based on the science of behavior. Four key elements of positive behavior include: 1) valued outcomes – interventions considered must be person-centered in spirit and culturally competent; 2) behavioral, biomedical, and mental health research – psychological and medical fields inform all intervention efforts; 3) validated procedures – evidence-based and promising practices are evaluated to demonstrate effectiveness; and 4) systems change – the larger contexts in which a person lives is assessed and changes made to ensure that evidence-based practices are effective and sustainable.