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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
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Working memory prioritization impacts neural recovery from distraction.

Remington Mallett1, Jarrod A Lewis-Peacock1

  • 1Department of Psychology, University of Texas at Austin, USA.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|October 21, 2019
PubMed
Summary

Prioritizing information in working memory makes it more vulnerable to disruption. Neural evidence shows that highly prioritized memories are less able to recover after distraction.

Keywords:
AttentionDistractionInterferencePrioritizationWorking memory

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Working memory protects information over short periods.
  • Prioritization may increase vulnerability of high-priority items to disruption.

Purpose of the Study:

  • Investigate how prioritizing working memory impacts neural representation recovery after distraction.
  • Examine the neural basis of working memory vulnerability.

Main Methods:

  • Used functional magnetic resonance imaging (fMRI) and multivoxel pattern analysis.
  • Implemented a delay-period retrospective cueing task with a distraction paradigm.
  • Assessed neural reinstatement of prioritized and non-prioritized items post-distraction.

Main Results:

  • Prioritization successfully enhanced neural evidence for cued items.
  • Both high- and low-priority items were reinstated after distraction.
  • Only low-priority items recovered to pre-distraction representational levels.
  • Greater prioritization predicted more disruption for high-priority items.

Conclusions:

  • Neural evidence suggests prioritizing working memory content in perceptual regions increases its susceptibility to disruption.
  • Prioritization paradoxically enhances vulnerability, challenging assumptions about protective mechanisms.