Bandura conducted an experiment with a five-foot inflatable doll that he called a Bobo doll. In the experiment, children's aggressive behaviour was influenced by whether or not the teacher was punished for her behaviour. In one scenario, a teacher acted aggressively with the doll, hitting, throwing, and even punching the doll, while a child watched.
After watching the teacher, there were two types of responses by the children to the teacher's behaviour.
When the teacher was praised or ignored (and not punished for her behaviour), the children imitated what she did, and even what she said. They punched, kicked, and yelled at the doll.
When the teacher was punished for her bad behaviour, the children decreased their tendency to act as she had.