Learning is defined as a relatively permanent change in behavior due to a specific experience. To summarize the three basic types of learning, we have classical conditioning, operant conditioning and observational learning. Classical conditioning refers to the conditioning process where an originally neutral stimulus, through repeated pairing with a stimulus that normally elects a response, ends up drawing a similar or identical response. Observational learning is learning by observing the behavior of others and the consequences of the behavior; thus learning through imitation. Operant conditioning is a type of learning by which behaviors are strengthened if followed by a reinforcer or diminished if followed by a punisher. For example, children will keep using their manners if they are rewarded for this behavior. Children will stop pushing their siblings, if their is a consequence for this bad behavior. Learning happens throughout infancy, childhood, adolescence, adulthood and older-age.