Final answer:
Research in developmental psychology shows that school-age children view the mind as an active and constructive agent, according to Jean Piaget's cognitive development theory.
Step-by-step explanation:
Research in developmental psychology reveals that school-age children view the mind as an active and constructive agent. According to Jean Piaget, a renowned cognitive development theorist, children develop schemata to categorize and interpret information. They assimilate new information based on their existing schemata and accommodate their schemata when encountering new information.