Cognitive psychology is the scientific study of the mind and mental functions, including learning, memory, attention, perception, reasoning, language, conceptual development and decision making. The modern study of cognition is based on the premise that the brain can be understood as a complex computer system. The cognitive approach began to revolutionize psychology in the 1950s and 1960s. It became the dominant approach in psychology in the 1970s. Interest in mental processes had gradually been restored through the work of Piaget and Tolman. It was the arrival of the computer that provided cognitive psychology with the terminology and metaphor needed to investigate the human mind. The beginning of the use of computers allowed psychologists to try to understand the complexities of human cognition by comparing it to something simpler and better understood, an artificial system such as a computer. Using the computer as a tool to think about how the human mind handles information is known as the computer analogy. Then computers encode the information, store the information, use the information, and produce a file