Theories of Development IThis module is an overview of theory in action. Theories include: cognitive, psychosexual, psychosocial, behaviorist, social learning, and sociocultural. The video explains the concept of the "whole child" and shows how theories tend to focus on only part. Examples are given of how one theory can contradict another. Theorists include: Piaget, Freud, Erickson, Gesell, Skinner, Vygotsky.