Conservation of numbers, classification, and seriation are traits of the concrete operational stage of this man's four-stage theory of cognitive development.
This man wrote about how science helps Sebastian overcome a religious crisis in the autobiographical Recherche. In one of his studies, he used the "three-mountains problem" to demonstrate his theory of egocentrism. This man's most notable theory was critiqued by Lev Vygotsky, whose "zone of proximal development" theory contradicted this man's set hierarchy. This author of The Grasp of Consciousness argued that subjects use assimilation and accommodation to create symbolic and behavioral schemata. Conservation of numbers, classification, and seriation are traits of the concrete operational stage of this man's four-stage theory of cognitive development. For 10 points, name this Swiss psychologist noted for his studies with children.
This man wrote about how science helps Sebastian overcome a religious crisis in the autobiographical Recherche.
Jean Piaget