Round 10: Tossup 8

This psychologist illustrated the idea of conservation by asking people whether a ball or a thin “hot dog” had more clay. (15[1])This psychologist’s ideas were inspired by seeing wrong answers to problems on Alfred Binet’s IQ tests. People assimilate new info or change their existing knowledge via accommodation in this psychologist’s idea of (*) schemas. Milestones like overcoming egocentric (10[1]-5[1])thought and obtaining object permanence occur in a model by this psychologist which includes the preoperational and sensorimotor stages. (10[1])For 10 points, name this Swiss psychologist who theorized four stages of childhood cognitive (-5[1])development. ■END■ (10[1]0[10])

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