Frustration of one's attempt to feel worthwhile and gain acceptance also often leads to unhealthy aggression. Most children who have low self-esteem tend to vent their hostile feelings against inanimate objects, rather than other people. Children also learn aggressive behavior by observing others. Some young people who have been bullied by older brothers and sisters imitate this behavior in dealing with children younger than themselves. Others will imitate their parents' methods of disciplining them as they interact with children of their own age.
Children identify with adults and peers they love or admire.
Sometimes they'll even imitate a person they fear. All children acquire many behaviors by copying what they see others doing. The third important factor that often contributes to aggression is parents' standards of behavior. Parents often encourage aggressive behavior through the standards communicated to the children. Mom or Dad might vicariously enjoy and stimulate the child's aggression.