Final answer:
Research on cognitive development reveals that school-age children view the mind as an active and constructive agent. Jean Piaget's theory of cognitive development suggests that children develop schemata and adjust them as they learn new information. Piaget's research also showed that children develop object permanence and move from concrete thinking to abstract thought during adolescence.
Step-by-step explanation:
Research on cognitive development reveals that school-age children view the mind as an active and constructive agent. Jean Piaget's theory of cognitive development suggests that children develop schemata to help them understand the world and adjust their schemata through assimilation and accommodation when they learn new information. Piaget's research also showed that children develop object permanence and move from concrete thinking to abstract thought during adolescence.