Jean Piaget's ideas about child development continue to influence ... This conviction led Piaget to develop his influential ...

It was originated by the Swiss developmental psychologist Jean Piaget (1896–1980 ... His experience and observations at the Alfred Binet Laboratory were the beginnings of his theory of cognitive ...

children enter the preoperational stage at around two years old Despite being over 70 years old, Piaget's theory is "still one of the prevailing theories in terms of cognitive development," Dr Sam ...

Jean Piaget ... to talk with children, play with them, ask them questions, and try to understand their thinking. Gradually he pieced together a "blueprint" for normal cognitive development ...