ABA therapy is a scientifically validated approach to understanding behavior and how the environment affects it. It uses principles of learning and motivation to teach skills. Positive reinforcement is a key principle, where rewarding a behavior makes it more likely to be repeated. ABA techniques have been developed since the 1960s to build useful skills in individuals with autism from toddlers to adults. ABA programs comprehensively address behavioral, social, communication, cognitive, self-help, play, and motor skills. When done correctly, ABA maximizes an individual's ability to express themselves and enjoy life by teaching them how to learn.