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Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)
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Is There an Activity-silent Working Memory?

Klaus Oberauer1, Edward Awh2

  • 1University of Zurich.

Journal of Cognitive Neuroscience
|September 19, 2022
PubMed
Summary
This summary is machine-generated.

Working memory (WM) may use activity-silent storage, maintaining information even without ongoing neural activity. This study found evidence for this silent storage, differentiating it from long-term memory retrieval.

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Working memory (WM) storage is typically associated with neural activity.
  • Prior research suggests information access persists despite temporary neural pattern interruptions, hinting at neurally silent WM storage.
  • An alternative explanation is retrieval from episodic long-term memory (eLTM) during these silent periods.

Purpose of the Study:

  • To differentiate between activity-silent WM storage and eLTM retrieval.
  • To investigate proactive interference (PI) as a marker for eLTM retrieval following WM interruptions.

Main Methods:

  • Participants performed memory tasks (color or location recall) with serially presented objects.
  • Interruptions involved challenging distractor tasks.
  • Proactive interference was assessed at different set sizes.

Main Results:

  • Proactive interference (PI) was observed for set sizes greater than 4, suggesting eLTM involvement when WM capacity was exceeded.
  • Performance with smaller set sizes remained resistant to PI, even after prolonged distractor tasks.
  • This PI-resistant memory suggests maintenance across interruptions of neural activity.

Conclusions:

  • Findings support the existence of activity-silent storage in working memory.
  • Working memory can maintain information independently of continuous neural activity.
  • Distinguishing between WM and eLTM is crucial for understanding memory dynamics.