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Working Memory

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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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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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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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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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Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or...
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Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment
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Long-term memory retrieval bypasses working memory.

Baiwei Liu1, Xinyu Li2, Jan Theeuwes3

  • 1Department of Psychology, Zhejiang Normal University, Jinhua, China; Department of Experimental and Applied Psychology, Vrije Universiteit, Amsterdam, the Netherlands.

Neuroimage
|July 26, 2022
PubMed
Summary
This summary is machine-generated.

Information retrieval from long-term memory (LTM) is possible even when working memory (WM) is full. This suggests LTM access may use a separate mechanism, challenging long-held assumptions about memory processing.

Keywords:
Alpha suppressionLong-term memoryMemory capacityWorking memory

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Memory

Background:

  • Traditional models assume long-term memory (LTM) retrieval requires transfer to working memory (WM).
  • Working memory (WM) has limited capacity, raising questions about LTM retrieval when WM is occupied.

Purpose of the Study:

  • To investigate if LTM retrieval is possible when WM capacity is fully engaged.
  • To explore the neural mechanisms underlying LTM retrieval under high WM load.

Main Methods:

  • Participants retrieved color information from LTM while performing a WM task designed to occupy full capacity.
  • Electroencephalogram (EEG) was used to measure brain activity, specifically alpha oscillation suppression.

Main Results:

  • Behavioral data confirmed successful LTM retrieval despite full WM engagement.
  • EEG results showed maximum alpha oscillation suppression during maximal WM load, with further amplification during simultaneous LTM retrieval.
  • This neural signature indicates memory retrieval capacity exceeding maximum WM capacity.

Conclusions:

  • Information retrieved from LTM does not invariably require transfer into WM.
  • A distinct neural mechanism may facilitate LTM access when WM is fully engaged.
  • Findings challenge established cognitive models of memory retrieval.