What is Lifespan Development?
Domains of Development
Major Issues & Debates
Stages of Development
Theories & Theorists
Nature vs. Nurture
Continuity & Discontinuity
Applications & Conclusion
Lifespan development is the scientific study of how and why human beings change over the course of their entire life — from conception through old age and death.
It examines the biological, psychological, and social changes that occur throughout a person's life, recognizing that development is a lifelong, multidimensional, and multidirectional process.
Changes in body size, shape, brain development, motor skills, and sensory capacities. Includes growth, puberty, aging, and health.
Changes in thought processes, memory, problem-solving, language, and intelligence across the lifespan.
Changes in emotions, personality, relationships, and social roles. Includes identity formation and moral development.
Physical development encompasses all bodily changes from the rapid growth of infancy to the gradual decline of old age. It is the most visible domain of development.
Erik Erikson proposed 8 stages of psychosocial development, each presenting a unique conflict that shapes personality.
Genetic inheritance and biological factors that influence development. Includes temperament, intelligence potential, and predispositions to certain conditions.
Environmental influences including family, culture, education, and experiences that shape who we become throughout our lives.
One of the most fundamental debates in developmental psychology concerns whether development is a gradual, continuous process or a series of distinct, qualitative stages.
Development is gradual and cumulative — like a slope. Changes are quantitative and incremental.
Development occurs in distinct stages — like steps. Changes are qualitative and abrupt.
"Is a caterpillar becoming a butterfly an example of continuity or discontinuity? The answer shapes how we understand all human development."— Developmental Psychology
4 stages of cognitive growth from birth through adolescence
8 stages of social-emotional development across the lifespan
Zone of Proximal Development; social interaction drives learning
Early emotional bonds shape all future relationships
3 levels of moral reasoning: preconventional, conventional, postconventional
Development shaped by nested environmental systems
Lifespan development spans from conception to death — it never truly stops
Three domains — Physical, Cognitive, and Psychosocial — are deeply interconnected
Nature and Nurture both play essential, interacting roles in shaping who we are
Development can be both continuous (gradual) and discontinuous (stage-like)
Great theorists like Piaget, Erikson, and Vygotsky provide frameworks to understand growth