Jean Piaget's ideas about child development ... This conviction led Piaget to develop his influential theory of cognitive ...

Jean Piaget (1896-1980 ... and abstractions like justice. Piaget is widely recognized as the greatest developmental psychologist of the century. His ideas have been refined and added to, but ...

But it isn't without its limitations, the biggest being that, according to Sam, it's "quite culturally biased" as Piaget based his theory on observations of his own daughter and nephew and is ...