1. The study of human development 2. Trends and issues in human development 3. Arnold Gesell and the maturational model 4. Other biological approaches ethology and sociobiology 5. Sigmund Freud and the psychoanalytic model 6. Erik Erikson s psychosocial perspective 7. The behavioral model basic assumptions and behavior analysis 8. Social learning views of development 9. The cognitive-developmental approach 10. The organismic model orthogenesis and dialectics 11. A discussion and comparison of developmental theories