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Related Concept Videos

Storage01:23

Storage

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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...
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Working Memory01:24

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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...
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Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
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Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

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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...
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Retrieval01:12

Retrieval

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Retrieval is the process of getting information out of memory storage and back into conscious awareness. This ability is essential for daily tasks like brushing hair and teeth, driving to work, and performing job duties. Retrieval occurs in three ways: recall, recognition, and relearning.
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Long-Term Memory01:18

Long-Term Memory

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Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
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Related Experiment Video

Updated: Aug 31, 2025

Eye Movement Monitoring of Memory
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Storage in Visual Working Memory Recruits a Content-Independent Pointer System.

William Thyer1,2, Kirsten C S Adam3,4, Gisella K Diaz1,2

  • 1Department of Psychology, The University of Chicago.

Psychological Science
|August 25, 2022
PubMed
Summary
This summary is machine-generated.

This study reveals a unique brain activity pattern in visual working memory that tracks memory load, not content. This load-sensitive neural activity may reflect a capacity-limited pointer system for memory storage.

Keywords:
electroencephalogramopen dataopen materialsspatiotemporal pointersvisual working memory

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Area of Science:

  • Cognitive Neuroscience
  • Neuroscience
  • Psychology

Background:

  • Working memory involves stimulus-specific neural activity reflecting stored content.
  • Previous research focused on neural activity representing the content of working memory.

Purpose of the Study:

  • To investigate a distinct class of neural activity indexing working memory load, independent of content.
  • To explore the neural mechanisms underlying the capacity limitations of working memory.

Main Methods:

  • Recorded electroencephalogram (EEG) activity in adult humans performing a visual working memory task.
  • Utilized multivariate analysis of EEG voltage topography to track memory load.
  • Varied the number of items and visual features stored in working memory.

Main Results:

  • Identified load-sensitive neural activity that precisely tracked the number of individuated items stored.
  • This neural signature robustly predicted individual differences in working memory capacity.
  • The load-sensitive activity generalized across different item types and feature variations, indicating content independence.

Conclusions:

  • Working memory may utilize a capacity-limited pointer system for tracking items.
  • This system indexes memory representations rather than their specific content.
  • Findings offer insights into the fundamental mechanisms of working memory capacity.