The study of human development is a rich and varied subject. We all have personal experience with development, but it is sometimes difficult to understand how and why people grow, learn, and act as they do. Theories of child development provide a useful framework for thinking about human growth, development, and learning. If you have ever wondered about what motivates human thought and behavior, understanding these theories can provide useful insight into both individuals and society. The following are just a few of the major theories that have emerged to explain various aspects of human development:

• Erikson's Theory of Psychosocial Development
• Freud's Theory of Psychosexual Development
• Piaget's Theory of Cognitive Development
• Kohlberg's Theory of Moral Development