Different definitions from different theorists, different schools of learning. Cognition: activity of knowing and the mental processes used to acquire knowledge and solve problems. Cognitive development: changes that occur in mental skills and abilities over the course of life. *development does not stop it is an ongoing process from birth-death. Genetic epistemology: experimental study of cognitive development developed by piaget. Intelligence: adaptation to environment: achieving cognitive equilibrium. Means of having harmony between thought processes and the: child as a constructivist environment. Saw children as little scientists (cid:498)constructivists(cid:499) Gain knowledge about environment by interacting with the environment: schemes. Infants do this through the creation of schemes. Rearranging existing schemes into more complex ones: adaptation: Occurs through assimilation and accommodation: assimilation: Ex. what we know about tables we take in a new table scheme and integrate it to our existing scheme of tables and broaden our understanding: accommodation: Modify existing schemes to interpret new experiences.