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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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Related Experiment Video

Updated: Jul 11, 2025

Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)
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When working memory may be just working, not memory.

Andre Beukers1, Maia Hamin2, Kenneth A Norman1

  • 1Department of Psychology, Princeton University.

Psychological Review
|November 13, 2023
PubMed
Summary
This summary is machine-generated.

The N-back task may rely on episodic memory (EM) rather than working memory (WM) capacity. A neural network model demonstrates how EM, not WM limits, explains N-back task performance, including set-size effects.

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Area of Science:

  • Cognitive Neuroscience
  • Computational Neuroscience

Background:

  • The N-back task is a standard measure of working memory (WM), involving stimulus maintenance and processing.
  • Performance variations, like the set-size effect, are typically attributed to limited WM capacity.

Purpose of the Study:

  • To investigate if episodic memory (EM) retention, rather than WM capacity limits, can explain N-back task effects.
  • To propose an alternative model for N-back task performance.

Main Methods:

  • A neural network model was developed with an EM component but no WM retention capacity.
  • The model was trained to perform the N-back task.

Main Results:

  • The model successfully replicated set-size and lure effects observed in human N-back studies.
  • Performance was explained by temporal distinctiveness effects on EM retrieval and subsequent WM processing.

Conclusions:

  • N-back task performance may be driven by EM retrieval processes interacting with WM, not solely by WM capacity limitations.
  • This challenges the view of the N-back task as a pure measure of WM capacity and highlights the interplay between WM and EM.