Experimental Cognitive Psychology

April 2, 2015


Experimental cognitive

cognitive psychology sub-topicsBy published 2007, updated 2015

Cognitive Psychology revolves around the notion that if we want to know what makes people tick then we need to understand the internal processes of their mind. Cognition literally means “knowing”. In other words, cognitive psychology refers to the study of human mental processes and their role in thinking, feeling, and behaving.

Cognitive psychology focuses on the way humans process information, looking at how we treat information that comes in to the person (what behaviorists would call stimuli), and how this treatment leads to responses. In other words, they are interested in the variables that mediate between stimulus/input and response/output. Cognitive psychologists study internal processes including perception, attention, language, memory and thinking.

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 development of better experimental methods.

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.

Information Processing

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.

computer brain metaphorBut 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:

  1. Information made available from the environment is processed by a series of processing systems (e.g. attention, perception, short-term memory);
  2. These processing systems transform, or alter the information in systematic ways;
  3. The aim of research is to specify the processes and structures that underlie cognitive performance;
  4. Information processing in humans resembles that in computers.

Mediational Processes

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.

The History of Cognitive Psychology

* Norbert Wiener (1948) published Cybernetics: or Control and Communication in the Animal and the Machine, introducing terms such as input and output.

* 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.

* 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.).

Critical Evaluation

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.

See also:
  • Peggy Hamburg
Source: www.simplypsychology.org

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