This document summarizes several developmental theories across the lifespan, including:
- Freud's psychosexual stages from birth to puberty based on pleasure
- Erikson's psychosocial stages that occur across the entire lifespan defined by opposing possibilities
- Piaget's cognitive stages showing how children learn and adapt
- Understanding of gender identity, stability, and consistency
- Late adulthood issues like integrity, despair, reminiscence, and life review
- Theories of intelligence by Sternberg and emotional intelligence by Goleman