Jean Piaget

Jean Piaget (1896-1980) was a Swiss psychologist most celebrated for his pioneering work in child development. He introduced the theory of cognitive development, which revolutionized how we understand children's intellectual growth. One of his key accomplishments is the identification of four stages of cognitive development: sensorimotor, preoperational, concrete operational, and formal operational. In 1936, Piaget published "The Origins of Intelligence in Children," which detailed his observational studies and theories. Another notable work is "The Psychology of the Child," co-authored with Bärbel Inhelder in 1969, which further elaborates on his developmental stages. His meticulous research and publications remain fundamental to developmental psychology.