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Related Concept Videos

Chunking01:12

Chunking

Chunking is a powerful cognitive technique that improves short-term memory retention by organizing information into smaller, more manageable units. The brain, limited by working memory capacity, can more easily process and store information when it is divided into "chunks" rather than presented as discrete, unrelated elements. Chunking is especially useful when dealing with large amounts of information, such as numerical sequences, words, or complex ideas.
The principle behind chunking is...
Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

Improving short-term memory can be achieved through techniques like chunking and rehearsal. Chunking involves organizing information into larger, more manageable units. This technique is particularly useful for information that exceeds the typical memory span of between five and nine items. For instance, logging into an online account with a password like "ta89vq0179gz" involves grouping letters and numbers into three chunks—ta89, vq01, and 79gz. It makes large amounts of information more...
Storage01:23

Storage

A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze each...
Understanding Memory01:19

Understanding Memory

Memory is the retention of information or experiences over time, facilitated through three main processes: encoding, storage, and retrieval. Encoding is the process of inputting information into the memory system. For instance, when listening to a lecture, watching a play, reading a book, or having a conversation, the brain is actively encoding information. This initial stage involves transforming sensory input into a form that can be processed and stored by the brain. Various factors, such as...
Working Memory01:24

Working Memory

Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this information.

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Recall of rapidly presented random chess positions is a function of skill.

Psychonomic bulletin & review·2013
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Retention of visually presented information in children's spelling.

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Expertise effects in memory recall: comment on Vicente and Wang (1998).

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Expert chess memory: revisiting the chunking hypothesis.

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Related Experiment Video

Updated: Jul 12, 2026

The DREAM Implant: A Lightweight, Modular, and Cost-Effective Implant System for Chronic Electrophysiology in Head-Fixed and Freely Behaving Mice
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The DREAM Implant: A Lightweight, Modular, and Cost-Effective Implant System for Chronic Electrophysiology in Head-Fixed and Freely Behaving Mice

Published on: July 26, 2024

How Big Is a Chunk?: By combining data from several experiments, a basic human memory unit can be identified and

H A Simon

    Science (New York, N.Y.)
    |February 8, 1974
    PubMed
    Summary

    This study reframes cognitive experiments using parameter estimation, revealing key human information processing constants. Findings include short-term memory capacity and long-term memory fixation rates, explaining diverse cognitive performances.

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    Published on: May 14, 2009

    Area of Science:

    • Cognitive Psychology
    • Human Information Processing
    • Experimental Psychology

    Background:

    • Traditional hypothesis-testing paradigms yield limited experimental data.
    • Integrating higher mental processes with simpler cognitive experiments requires a new framework.

    Purpose of the Study:

    • To explore interactions between higher mental processes and simpler cognitive experiments.
    • To demonstrate the utility of a parameter-estimating paradigm over hypothesis-testing.
    • To identify and measure fundamental parameters of the human information processing system.

    Main Methods:

    • Re-framing experimentation within a parameter-estimating paradigm.
    • Analyzing data to estimate basic cognitive parameters.
    • Integrating experimental findings with contemporary theoretical models.

    Main Results:

    • The psychological "chunk" is a validated unit of information.
    • Short-term memory capacity is estimated at 5-7 chunks.
    • Information fixation in long-term memory takes approximately 5-10 seconds per chunk.
    • Estimated "magical numbers" include visual scanning speeds and grammatical transformation times.

    Conclusions:

    • Parameter estimation provides richer insights into cognitive processes.
    • Key constants like short-term memory capacity and long-term memory fixation rate explain a broad range of psychological findings.
    • This approach offers a unified explanation for diverse cognitive performances documented over decades.