Albert Bandura was a leading researcher in observational learning theory. Observational learning occurs when an observer's behavior changes based on watching a model's behavior, without direct reinforcement. According to Bandura, observational learning does not require imitation of the model's exact behavior, and children in particular learn through observing and modeling others. Reinforcement theory also influences observational learning, as observers are more likely to replicate behaviors they observe being rewarded or punished.