An introduction to the study of thought, memory, language, and attention from the point of view of information processing. In surveying research in cognitive psychology, substantial contact is made with related cognitive sciences, such as artificial intelligence, linguistics, neuroscience, and contemporary philosophy. In the course of examining general principles of cognition, the following topics are discussed: mental imagery; concepts; reasonong; discourse, monetary and courtroom decision making; eye-witness testimony; social attribution and sterotyping; language in chimpanzees; expert systems; the relationship between information processing and conscious experience; and the philosophical foundations of cognitive science.