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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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Are latent working memory items retrieved from long-term memory?

Chang Mao Chao1, Chenlingxi Xu1, Vanessa Loaiza2

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|November 20, 2023
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Summary
This summary is machine-generated.

Switching attention in working memory (WM) does not rely on long-term memory (LTM) retrieval. Reactivating latent WM items impacts WM performance but not subsequent LTM accuracy, challenging LTM-based theories.

Keywords:
Activity-silentageinglatentlong-term memoryretrocueworking memory

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Memory

Background:

  • Switching attention between items in working memory (WM) is essential for cognition.
  • The underlying mechanisms for managing attention within WM, especially for temporarily unattended items, remain poorly understood.
  • One hypothesis suggests that retaining and reactivating these
  • latent
  • items involves long-term memory (LTM) retrieval processes, even for short delays.

Purpose of the Study:

  • To investigate whether episodic LTM retrieval processes are involved in reactivating latent items within WM.
  • To test the LTM account of latent WM by examining WM performance and subsequent LTM for reactivated items.
  • To compare these effects across young adults and older adults, and under conditions of full versus divided attention during WM delays.

Main Methods:

  • A two-item, double-retrocue WM task was employed.
  • Participants switched attention away from and then reactivated specific WM items.
  • Subsequent LTM tests assessed recognition memory (item, location, associative) for reactivated, continuously retained, and control items, with confidence ratings.

Main Results:

  • Reactivating latent WM items significantly affected WM performance.
  • Ageing and divided attention also impacted WM performance.
  • Crucially, these WM manipulations did not interact with or systematically alter subsequent LTM performance for reactivated items compared to controls.

Conclusions:

  • The findings dissociate WM and LTM, demonstrating that WM reactivation does not depend on LTM retrieval.
  • These results contradict the LTM account of latent WM.
  • The data are more consistent with dynamic processing models of WM, emphasizing active manipulation over passive LTM storage.