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Working memory capacity and redundant information processing efficiency.

Michael J Endres1, Joseph W Houpt2, Chris Donkin3

  • 1Department of Health, Behavioral Health Administration Honolulu, HI, USA ; Department of Psychology, University of Hawaii Honolulu, HI, USA.

Frontiers in Psychology
|June 16, 2015
PubMed
Summary
This summary is machine-generated.

Working memory capacity (WMC) influences how efficiently individuals search and retrieve information. Redundant information affects working memory search speed, independent of overall capacity.

Keywords:
individual differenceslinear ballistic accumulatormemory retrievalsystems factorial technologyworking memory capacity

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Area of Science:

  • Cognitive Psychology
  • Neuroscience

Background:

  • Working memory capacity (WMC) is crucial for managing information and resisting distractions.
  • Understanding WMC's role in complex cognitive tasks is essential for cognitive science.

Purpose of the Study:

  • To investigate how individual differences in WMC relate to performance on a novel redundant memory probes (RMP) task.
  • To examine the impact of varying target and distractor information on working memory search and retrieval efficiency.

Main Methods:

  • 170 participants completed intelligence tests, WMC tasks, and the RMP task.
  • The RMP task manipulated the amount of information to be remembered and ignored.
  • Linear Ballistic Accumulator (LBA) models were used to estimate information processing efficiency.

Main Results:

  • The RMP task demonstrated that redundant information can both facilitate and inhibit memory search and retrieval.
  • Accuracy, response times, and LBA model estimates confirmed these facilitation and inhibition effects.
  • High and low WMC groups did not differ in the magnitude of redundancy effects but showed differences in overall search and retrieval efficiency.

Conclusions:

  • Redundant information reliably impacts the speed of working memory search.
  • These effects on search efficiency are distinct from general working memory capacity limitations.