Since 1950, a number of individuals have made contributions to the subject of cognitive psychology, including Jean Piaget, Noam Chomsky, and Leon Festinger. The storage, processing, retrieval, and use of information, as well as how this impacts human cognition, language, problem-solving, and creativity, are all of interest to cognitive scientists. They argue that conduct is impacted by a range of mental processes, such as perceptions, memories, and expectancies, and is not simply a response to signals.