Cognition refers to mental processes such as intelligence, learning, and memory. The ways in which we perceive, recall, reason, make decisions, solve problems, and make sense of the world around us are all cognitive processes. Does intelligence decline with aging? Is memory loss inevitable as we grow old? These are questions that gerontologists who study cognitive processes among older adults have focused on during the past few decades. This course will discuss two of the most common modes of studying cognition in later life are the psychometric model and the information processing model.