"the study of intelligence and intelligent systems, with particular reference to intelligent behaviour as computation" (Simon & Kaplan, 1989)
Simon, H. A. & C. A. Kaplan, "Foundations of cognitive science", in Posner, M.I. (ed.) 1989, Foundations of Cognitive Science, MIT Press, Cambridge MA.
Cognitive science refers to the interdisciplinary study of the acquisition and use of knowledge. It includes as contributing disciplines: artificial intelligence, psychology, linguistics, philosophy, anthropology, neuroscience, and education. The cognitive science movement is far reaching and diverse, containing within it several viewpoints.
Cognitive science grew out of three developments: the invention of computers and the attempts to design programs that could do the kinds of tasks that humans do; the development of information processing psychology where the goal was to specify the internal processing involved in perception, language, memory, and thought; and the development of the theory of generative grammar and related offshoots in linguistics. Cognitive science was a synthesis concerned with the kinds of knowledge that underlie human cognition, the details of human cognitive processing, and the computational modeling of those processes.
There are five major topic areas in cognitive science: knowledge representation, language, learning, thinking, and perception.
Eysenck, M.W. ed. (1990). The Blackwell Dictionary of Cognitive Psychology. Cambridge, Massachusetts: Basil Blackwell Ltd.
Generally stated, this is the study of intelligence and intelligence systems.
It is a relatively new science that combines knowledge gained from a number of disciplines. These include: computer science,neuroscience, cognitive psychology, philosophy, and linguistics.
As a result of the collaborative effort between these disciplines, there have been, and will continue to be, huge advancements in our understanding of human cognition.