This document defines learning and discusses various types and principles of learning. It defines learning as a relatively permanent change in behavior resulting from experience. The types of learning discussed are motor, verbal, concept, and attitude learning. The principles of learning explained are operant conditioning established by Skinner, and classical conditioning established by Pavlov involving conditioning a response to a neutral stimulus. Examples are given of using operant and classical conditioning in clinical settings. Learning theories discussed include behavioral, cognitive, social, and humanistic approaches.