This is the graduate core course in cognitive development, focusing on thinking and intellectual growth from infancy through late life. (There will be greater emphasis on development to adulthood; later developments are covered further in the core course on the psychology of aging.) Topics covered include: concepts, literacy, numeracy, problem-solving, memory, and individual differences, as well as influences on cognitive development such as family interactions, schooling, television, cultural differences and more. We will consider historical development of the field, including its leading figures, but will focus particularly on recent theory and research (both experimental and observational). There will be occasional lectures but most often the course will run in a seminar format.