Piaget devised a variety of tests for assessing the child's intellectual stage. For example, he calls one of his experiments "conservation of matter." The young child is shown two clay balls, each ...

Why do babies love peekaboo so much? It may be because when you hide your face, they think it has ceased to exist. That’s according to Swiss psychologist Jean Piaget’s theories about “object ...

Jean Piaget, a psychologist known ... During a child psychology class, WJU students had the chance to perform Piaget's conservation tests with children ranging from three and a half to 11 years old.