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System of Memory01:23

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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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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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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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Information enters the brain through encoding, which is the input of information into the memory system. Once sensory information is received from the environment, the brain labels or codes it. The information is then organized with similar information and connected to existing concepts. Encoding occurs through automatic processing and effortful processing.
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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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Mnemonic devices are cognitive tools that facilitate memory retention by linking new information to familiar patterns or organizational strategies. These techniques are beneficial for remembering complex or lengthy sets of information by simplifying and structuring them in easily retrievable ways.
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Related Experiment Video

Updated: May 4, 2026

Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition
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Slave systems in verbal short-term memory.

David Caplan1, Gloria Waters2, David Howard3

  • 1Department of Neurology, Massachusetts General Hospital, Boston, MA, USA.

Aphasiology
|December 19, 2013
PubMed
Summary
This summary is machine-generated.

The influential working memory (WM) model for short-term memory (STM) tasks shows inconsistencies. Cognitive neuropsychologists may need alternative models for patient performance analysis.

Keywords:
AphasiaAphasiologyBrainLanguageNeuropsychologyPsychosocial

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Area of Science:

  • Cognitive Psychology
  • Neuropsychology

Background:

  • The working memory (WM) model is a dominant theory in cognitive neuropsychology for understanding short-term memory (STM) deficits.
  • This model, primarily developed by Alan Baddeley and colleagues, has significantly influenced research on STM performance.

Purpose of the Study:

  • To critically review the WM model by examining its development in studies of normal individuals.
  • To analyze the application of the WM model to neuropsychological cases.
  • To explore modifications and extensions of the WM theory based on clinical data.

Main Methods:

  • Literature review focusing on major phenomena in STM research.
  • Inclusion of both normative (non-brain-damaged) and neuropsychological (brain-damaged) data.
  • Detailed examination of selected studies relevant to WM phenomena.

Main Results:

  • The review synthesizes normative and neuropsychological data concerning the WM model.
  • Identified key phenomena and their treatment within the WM framework.

Conclusions:

  • The WM model exhibits significant inconsistencies and empirical inadequacies.
  • Cognitive neuropsychologists should consider alternative models for explaining patient performance on STM tasks.