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Most students know that testing yourself works better than rereading. Most students still reread. John Flavell would have recognised this at once. The gap between knowing a strategy and using it is where his idea of metacognition began, and it is the reason the idea matters for anyone preparing for an exam.
Who was John Flavell?
Flavell was a developmental psychologist who studied how children's thinking grows. According to an obituary in American Psychologist, he began teaching child development at the University of Rochester in 1956, moved to the University of Minnesota in 1965 and joined Stanford in 1976. He is widely credited with bringing Jean Piaget's theory to English-speaking psychologists, and he coined the terms "metacognition" and "metamemory". He was born in 1928 and died in 2025.
How did a study of children's memory lead to metacognition?
Flavell told the story himself in a 1993 oral history interview for the Society for Research in Child Development. He had been interested in children's private speech, an idea from Vygotsky, and wanted a task where it could be observed. Memory was a convenient choice, because rehearsing a list under your breath is a simple kind of private speech.
That work, published as Spontaneous Verbal Rehearsal in a Memory Task as a Function of Age (1966) with Beach and Chinsky, turned up something unexpected. Young children mostly did not rehearse, even though they could when asked to, and older children did. Flavell called this a production deficiency: the skill is there, but the child does not produce it when it would help.
Around 1968 or 1969, he says in the interview, a new question followed. Perhaps people use strategies partly because they know something about how memory works. So his group began to study what children know about their own memory abilities, which he called metamemory. From there it widened to metacognition in general, including how people monitor whether they have understood what they are reading.
What is metacognition?
In plain terms, metacognition is knowledge about your own thinking and the habit of checking it while you work. Flavell set out the field in Metacognition and cognitive monitoring (1979), whose title calls it "a new area of cognitive-developmental inquiry". For a student, it covers three practical questions:
What do I know about this task? (Is this a recall question or a problem I have to set up?)
What do I know about myself? (I confuse sine and cosine components; I rush the last step.)
Is it working? (Can I explain this paragraph without looking, or does it only feel clear?)
In the same interview, Flavell said: "I know that the meta-cognitive ideas have been my most important contribution to education if they've been important at all." It is a modest line from someone whose terms are now part of ordinary teaching.
Why do students misjudge what they know?
Metacognition depends on accurate monitoring, and monitoring is easy to get wrong. A chapter feels familiar after rereading, so it feels learned. Our post on judgments of learning covers the research on why that feeling misleads. The fix is to replace the feeling with a check.
What can a student take from Flavell's way of working?
Flavell's habit was to look at what people actually did, not what they could do in principle. Apply the same test to your own study.
Close the production gap. List the strategies you know work, such as self-testing, spacing and mixing problem types. Next to each, write when you last used it. The empty ones are your production deficiencies.
Predict, then check. Before a practice set, write how many you expect to get right. Compare after. A large gap tells you your monitoring needs work.
Monitor understanding while reading. After each section of a textbook, stop and explain it in two sentences without looking. If you cannot, reread that section only. The self-explanation technique gives a structure.
Plan before you solve. Write one line on what the question asks and which idea you will use. Then solve.
Review the process, not just the answer. After a test, note where you went wrong in your thinking: misread the question, chose the wrong principle, or made an algebra slip.
Monitoring is hard to do alone because you cannot easily see your own blind spots. Fermi's AI tutor notices where a student is stuck and decides whether to explain, ask or show, which gives you an outside check on what you think you know. For the developmental theory Flavell built on, see our post on Piaget's stages of cognitive development.
Before your next study session, write down your score prediction for one practice set, then do the set and compare.
