Skinnerian psychologies refers to the theories and principles established by the American psychologist B.F. Skinner, which emphasize the importance of environment and behavior on the development of human behavior. Synonyms for Skinnerian psychologies may include behavioral psychology, operant conditioning, behaviorism, or radical behaviorism. These terms all share the common thread of focusing on observable behaviors and their relationship with the environment. Other associated concepts may include reinforcement, shaping, punishment, and positive and negative consequences. While Skinnerian psychologies have garnered criticism over the years for their reductionist views of human behavior, they remain an important and influential area of study within psychology and related fields.