Psychology › Thinking, memory & biases
The cognitive revolution
1956· School or movement
Well replicatedStrong, repeated evidence.
In the 1950s psychologists brought the mind back into science, studying it as an information processor, much like a computer.
See it on the Psychology map →What it says
Behaviorism had ruled talk of inner mental life out of bounds. Around 1956, ideas from computing, information theory and linguistics converged. George Miller published 'The Magical Number Seven' on memory limits; Allen Newell and Herbert Simon showed a program that proved logic theorems; Noam Chomsky argued language needs inner rules. Miller later dated cognitive science's birth to an MIT symposium on 11 September 1956. Ulric Neisser's 1967 textbook, Cognitive Psychology, named the field.
Why it matters
It made memory, attention, language, reasoning and decisions measurable again, and paved the way for cognitive therapy, behavioral economics and artificial intelligence research.
Think of it like
Like going from judging a building only by rent in and expenses out to opening the mechanical room to see how it runs.
The evidence
Well documented in the 1956 papers, Neisser's 1967 textbook and later memoirs by Miller and others. Its core methods, such as reaction-time and memory experiments, remain standard today.
Open questions
Historians debate whether it was a true revolution or a gradual shift, since some behaviorists, like Edward Tolman with his 1948 'cognitive maps' in rats, already studied inner processes.
Inside this (3)
Connections (6)
▸Behaviorism was displaced by The cognitive revolutionWell replicated
The connection
Behaviorism treated the mind as a black box and studied only stimuli and responses. By the 1950s it struggled to explain language, planning and memory. Psychologists borrowed computer and information-theory ideas to model inner processes; by the 1970s cognitive psychology dominated, while behaviorist learning laws lived on in therapy and training.
Who showed it and when
American and British universities, mid-1950s to 1970s, including Harvard, MIT, Carnegie and Cambridge; key figures George Miller, Noam Chomsky, Herbert Simon and Ulric Neisser.
The evidence
Shifts in journal topics, textbooks and hiring from the 1960s onward, documented by participants such as Miller in later accounts.
Open questions
Some historians say behaviorism was absorbed rather than defeated: its rigorous measurement and lab control remain central to cognitive science.
▸The cognitive revolution set the stage for Heuristics and biasesWell replicated
The connection
Once the mind was treated as an information processor with limited capacity, it was natural to ask where processing goes wrong. Herbert Simon's 'bounded rationality' (1955) argued people settle for good-enough rather than optimal choices; Kahneman and Tversky then mapped specific shortcuts and their predictable errors.
Who showed it and when
Simon at Carnegie Tech in Pittsburgh in the 1950s; Kahneman and Tversky at the Hebrew University of Jerusalem from 1969, publishing in Science in 1974.
The evidence
Kahneman came from perception and attention research, and the pair framed their work in cognitive terms, drawing analogies to perceptual illusions.
Open questions
How far Simon and the heuristics program agree is debated: Simon saw shortcuts as adaptive, while Kahneman and Tversky stressed the errors.
▸Perception: how the brain builds what we see became a core topic of The cognitive revolutionWell replicated
The connection
Cognitive psychologists treated perception as information processing: stages that detect features, recognize patterns and interpret them. Ulric Neisser's 1967 textbook opened with visual and auditory perception, and David Marr's book Vision (1982) laid out how the brain might compute images step by step.
Who showed it and when
Neisser at Cornell, 1967; David Hubel and Torsten Wiesel's feature-detector studies, begun at Johns Hopkins in 1958 and continued at Harvard; Marr at MIT, whose book appeared after his death.
The evidence
Perception chapters lead cognitive textbooks from Neisser onward, and Hubel and Wiesel's 1981 Nobel tied perception to measurable brain processing.
Open questions
Whether perception is mostly built up from features or mostly predicted top-down from expectations remains an active debate.
▸Attention and its limits was revived as a topic by The cognitive revolutionWell replicated
The connection
William James wrote vividly about attention in 1890, but behaviorists dropped it as unobservable. Donald Broadbent's 1958 filter model treated attention as a bottleneck in an information channel, one of the first flowchart models of the mind, and made attention a central topic again.
Who showed it and when
Britain, 1950s: Broadbent at Cambridge's Applied Psychology Unit, building on Colin Cherry's 1953 'cocktail party' studies and wartime work with radar and air-traffic operators.
The evidence
Broadbent's book Perception and Communication (1958) is widely cited as a founding text of cognitive psychology.
Open questions
Historians debate whether the revolution was mainly American; Broadbent's applied British research suggests it had more than one birthplace.
▸Cognitive behavioral therapy (CBT; Beck, Ellis) drew on The cognitive revolutionWell replicated
The connection
Behaviorism had dismissed thoughts as unscientific. The cognitive revolution made mental processes such as beliefs, attention and memory legitimate subjects again. Beck and Ellis applied that view to therapy: how people interpret events drives their emotions, so changing interpretations changes feelings and behavior.
Who showed it and when
From the late 1950s to the 1970s; Albert Bandura, Donald Meichenbaum and Michael Mahoney helped merge cognitive and behavior therapies into 'cognitive-behavioral' therapy.
The evidence
Beck's 1976 book Cognitive Therapy and the Emotional Disorders and the journal Cognitive Therapy and Research, founded in 1977, record the shift explicitly.
Open questions
Beck credited clinical observation more than lab psychology, so historians debate whether CBT grew from the cognitive revolution or developed alongside it.
▸Language and Chomsky's challenge to behaviorism helped launch The cognitive revolutionWell replicated
The connection
Chomsky's argument that language requires inner rules and inborn structure showed behaviorism could not explain a central human ability. His 1956 MIT talk and 1957 book Syntactic Structures gave psychologists a model of the mind as a rule-based system, energizing the new cognitive approach.
Who showed it and when
MIT symposium on information theory, September 1956; Syntactic Structures, 1957; the Skinner review, 1959. George Miller worked with Chomsky around 1960.
The evidence
Miller and other founders named Chomsky as a key influence, and the 1956 symposium is commonly treated as cognitive science's birth.
Open questions
Chomsky's influence on psychology outlasted acceptance of his specific theories; how much the revolution depended on him is debated.