This psychologist's most famous theory describes the development of object permanence during the Sensorimotor stage, which precedes the Preoperational and Concrete Operational stages.
Elton Mayo modeled this experimenter's clinical methods for his Hawthorne Experiments. This man described himself as a genetic epistemologist and analyzed behavioral and operational "schemata." He poured blue liquid into a taller and thinner glass from an identically-sized beaker to demonstrate his idea of (*) quantity conservation. This psychologist's most famous theory describes the development of object permanence during the Sensorimotor stage, which precedes the Preoperational and Concrete Operational stages. For ten points, identify this Swiss psychologist who divided the development of children into four steps.
Elton Mayo modeled this experimenter's clinical methods for his Hawthorne Experiments.
Jean Piaget