Harry Beilin described Jean Piaget's theoretical research program [19] as consisting of four phases: the sociological model of development, the biological model of. Piaget's Theory of Constructivism. The Theories of Jean Piaget. What is Piaget's Theory of Development? Who Was Jean Piaget? Jean Piaget was a philosopher from. Piaget's theory of cognitive development See also: Theory of cognitive development. Jean Piaget's theory [2] consists of four stages: Sensorimotor: (birth to 2 years. 1 Piaget’s Theory •The first “cognitive” theory, developed by Jean Piaget beginning about 1920. •Piaget observed and described children at Piaget's theory of cognitive development is a comprehensive theory about the nature and development of human intelligence. Piaget believed that one's childhood plays. Psychologist Jean Piaget suggested that children go through four key stages of cognitive development. Learn more about his influential theory. New Books: Cultural Development of Mathematical Ideas: Papua New Guinea Studies (G. Saxe) After Piaget (E. Marti & C. Rodrîguez) Piaget Foundation Newsletter. Piaget’s Cognitive Development Theory Ella Newkirk Free expectancy theory papers, essays, and research papers. Free Erikson papers, essays, and research papers. These results are sorted by most relevant first (ranked search). You may also sort these by color rating or.