AP Psychology
The third stage in Jean Piaget's theory of cognitive development, occurring between the ages of 7 and 11, where children gain the ability to think logically about concrete objects and events.
Piaget's Concrete Operational stage is a part of his cognitive development theory, highlighting children's ability to think logically about concrete events.
Key research includes Piaget's own studies, which found that during this stage (roughly ages 7-11), children gain an understanding of concepts such as conservation, reversibility, and cause and effect.