His most famous model includes understanding of conservation years after grasping that things which disappear from view have object permanence.
This theorist distinguished primary, secondary, and tertiary circular reactions from reflexes. With Bärbel Inhelder, he used a model of three mountains in one study to test de-centering, the ability to overcome egocentrism. He called himself a "genetic epistemologist," and claimed people either assimilate a new experience into old frameworks or accommodate it, creating new (*) "schemas." His most famous model includes understanding of conservation years after grasping that things which disappear from view have object permanence. For 10 points, name this Swiss psychologist who included sensorimotor and concrete operational as the first and third stages of child cognitive development.
This theorist distinguished primary, secondary, and tertiary circular reactions from reflexes.
Jean {Piaget} (pyah-ZHEY)