HOW DID PIAGET VIEW COGNITIVE DEVELOPMENT?
SELF-CHECK ITEM: Construct a chart in which the columns are headed: Sensorimotor, Preoperations, Concrete Operations, and Formal Operations. Assign the rows with ages from birth to adulthood. Next, describe the developmental changes that occur at each stage and age. STAGE AGES DEVELOPMENTAL CHANGES Sensorimotor Birth to 2 years Gradual emergence of mental representation, and gradual progression from reflexive to goal-directed behavior. The major achievement is object permanence. Preoperations 2 to 7 years Ability to represent objects symbolically. However, children still lack ability to manipulate objects mentally. Therefore, they are unable to solve problems like conservation, which require mentally reversing processes (e.g., pouring liquid from one container to another). Concrete Operations 7 to 11 years Ability to employ operational thinking. Now children are able to not only represent objects mentally, but also operate upon objects mentally. Therefore, they have mastered conservati
