Psychologist Albert Bandura conducted the famous Bobo doll experiment in 1961 to study observational learning and aggression. In the experiment, children observed an adult acting aggressively towards a Bobo doll (punching, kicking, hitting it with a hammer). Later, the children who observed this behavior exhibited more aggressive behavior towards the Bobo doll than children who did not observe this model. The experiment demonstrated that children learn social behaviors like aggression through observation. It provided evidence for Bandura's social learning theory, showing that children imitate and model the behaviors they observe in others.