by By Saul McLeod published 2007, updated 2015
Cognitive psychology is the scienitific study of the mind as an information processor. Cognitive psychologists try to build up cognitive models of the information processing that goes on inside people’s minds, including perception, attention, language, memory, thinking and consciousness
The cognitive perspective applies a nomothetic approach to discover human cognitive processes, but have also adopted idiographic techniques through using case studies (e.g. KF, HM). Cognitive psychology is also a reductionist approach. This means that all behaviour, no matter how complex can be reduced to simple cognitive processes, like memory or perception.
Typically cognitive psychologists use the laboratory experiment to study behavior. This is because the cognitive approach is a scientific one. For example, participants will take part in memory tests in strictly controlled conditions. However, the widely used lab experiment can be criticized for lacking ecological validity (a major criticism of cognitive psychology).
Cognitive psychology became of great importance in the mid 1950s. Several factors were important in this:
The emphasis of psychology shifted away from the study of conditioned behaviour and psychoanalytical notions about the study of the mind, towards the understanding of human information processing, using strict and rigorous laboratory investigation.
The cognitive approach began to revolutionize psychology in the late 1950’s and early 1960’s, to become the dominant approach (i.e. perspective) in psychology by the late 1970s. Interest in mental processes had been gradually restored through the work of Piaget and Tolman.
But it was the arrival of the computer that gave cognitive psychology the terminology and metaphor it needed to investigate the human mind. The start of the use of computers allowed psychologists to try to understand the complexities of human cognition by comparing it with something simpler and better understood i.e. an artificial system such as a computer.
The use of the computer as a tool for thinking how the human mind handles information is known as the computer analogy. Essentially, a computer codes (i.e. changes) information, stores information, uses information, and produces an output (retrieves info). The idea of information processing was adopted by cognitive psychologists as a model of how human thought works.
The information processing approach is based on a number of assumptions, including:
Information made available from the environment is processed by a series of processing systems (e.g. attention, perception, short-term memory);
These processing systems transform, or alter the information in systematic ways;
The aim of research is to specify the processes and structures that underlie cognitive performance;
Information processing in humans resembles that in computers.
The behaviorists approach only studies external observable (stimulus and response) behaviour which can be objectively measured. They believe that internal behaviour cannot be studied because we cannot see what happens in a person’s mind (and therefore cannot objectively measure it).
In comparison, the cognitive approach believes that internal mental behaviour can be scientifically studied using experiments. Cognitive psychology assumes that a mediational process occurs between stimulus/input and response/output.
The mediational (i.e. mental) event could be memory, perception, attention or problem solving etc. These are known as mediational processes because they mediate (i.e. go-between) between the stimulus and the response. They come after the stimulus and before the response.
Therefore, cognitive psychologists’ say if you want to understand behaviour, you have to understand these mediational processes.
* Norbert Wiener (1948) published Cybernetics: or Control and Communication in the Animal and the Machine, introducing terms such as input and output.
* Tolman (1948) work on cognitive maps training rats in mazes, showed that animals had internal representation of behavior.
* Birth of Cognitive Psychology often dated back to George Miller’s (1956) “The Magical Number 7 Plus or Minus 2.”
* Newell and Simon’s (1972) development of the General Problem Solver.
* In 1960, Miller founded the Center for Cognitive Studies at Harvard with famous cognitive developmentalist, Jerome Bruner.
* Ulric Neisser (1967) publishes "Cognitive Psychology", which marks the official beginning of the cognitive approach.
* Process models of memory Atkinson & Shiffrin’s (1968) Multi Store Model.
* Cognitive approach highly influential in all areas of psychology (e.g. biological, social, behaviorism, development etc.).
B.F. Skinner criticizes the cognitive approach as he believes that only external stimulus - response behavior should be studied as this can be scientifically measured. Therefore, mediation processes (between stimulus and response) do not exist as they cannot be seen and measured. Skinner continues to find problems with cognitive research methods, namely introspection (as used by Wilhelm Wundt) due to its subjective and unscientific nature.
Humanistic psychologist Carl Rogers believes that the use of laboratory experiments by cognitive psychology have low ecological validity and create an artificial environment due to the control over variables. Rogers emphasizes a more holistic approach to understanding behavior.
The information processing paradigm of cognitive psychology views that minds in terms of a computer when processing information. However, there are important difference between humans and computers. The mind does not process information like a computer as computers don’t have emotions or get tired like humans.
The cognitive approach does not always recognize physical (re: biological psychology) and environmental (re: behaviorism) factors in determining behavior.
Cognitive psychology has influenced and integrated with many other approaches and areas of study to produce, for example, social learning theory, cognitive neuropsychology and artificial intelligence (AI).
Atkinson, R. C., & Shiffrin, R. M. (1968). Chapter: Human memory: A proposed system and its control processes. In Spence, K. W., & Spence, J. T. The psychology of learning and motivation (Volume 2). New York: Academic Press. pp. 89–195.
Miller, G. A. (1956). The magical number seven, plus or minus two: some limits on our capacity for processing information. Psychological Review, 63 (2): 81–97.
Neisser, U (1967). Cognitive psychology. Appleton-Century-Crofts: New York
Newell, A., & Simon, H. (1972). Human problem solving. Prentice-Hall.
Tolman E. C. (1948). Cognitive maps in rats and men. Psychological Review. 55, 189–208
Wiener, N. (1948). Cybernetics or control and communication in the animal and the machine. Paris, (Hermann & Cie) & Camb. Mass. (MIT Press).
McLeod, S. A. (2015). Cognitive Psychology. Retrieved from www.simplypsychology.org/cognitive.html
Cognition: How Do You Think?
Case Study: HM - The Man Who Couldn't Remember
Peterson and Peterson (1959) - Duration of Short Term Memory
Piaget and Inhelder (1956) - The Three Mountains Task
Loftus and Palmer (1974) - Car Crash Study