Who is known for studying lifespan development and introducing a stage theory approach?

• A. Piaget
• B. Erikson
• C. Havighurst
• D. Vygotsky

Answer: (B)

The individual known for studying lifespan development and introducing a stage theory approach is Erikson. His theory, known as Erikson's psychosocial development theory, outlines eight stages of human development, each characterized by a central conflict that must be resolved for healthy psychological development. This approach emphasizes the importance of social and emotional challenges throughout the lifespan, from infancy through late adulthood.

Erikson's stages are distinctively focused on how individuals navigate various psychosocial crises, such as trust versus mistrust in infancy or integrity versus despair in old age. His work is foundational in understanding how personality develops and evolves over time, reflecting a comprehensive view of human growth that encompasses life from birth to death.

The other theorists, while significant in their own rights, primarily focus on different aspects of human development. For example, Piaget concentrated on cognitive development in children, Havighurst focused on developmental tasks throughout life, and Vygotsky emphasized social interaction and cultural context in learning, making Erikson's approach uniquely holistic in exploring psychological development across the entire lifespan.