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Related Experiment Video

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The Attentional Set Shifting Task: A Measure of Cognitive Flexibility in Mice
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Flexibility of representational states in working memory.

Nahid Zokaei1, Shen Ning2, Sanjay Manohar1

  • 1Department of Experimental Psychology, University of Oxford Oxford, UK ; Nuffield Department of Clinical Neurosciences, University of Oxford Oxford, UK.

Frontiers in Human Neuroscience
|November 22, 2014
PubMed
Summary

Attention and working memory (WM) interact dynamically. Items in WM can be flexibly prioritized within the focus of attention (FOA) or de-prioritized based on behavioral relevance, impacting recall.

Keywords:
attentionincidental cueingrepresentational statesretro cueingworking memory

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Working memory (WM) and attention exhibit a strong interdependence.
  • Attention influences the representational state of items within WM, with a focus of attention (FOA) prioritizing certain items.

Purpose of the Study:

  • To investigate the representational flexibility of items within WM.
  • To explore how items outside the FOA are maintained and can be re-prioritized.
  • To examine the impact of behavioral relevance on WM item retrievability.

Main Methods:

  • Utilized three experimental paradigms to probe WM contents.
  • Employed transcranial magnetic stimulation (TMS) targeting early visual cortex to manipulate items within the FOA.
  • Assessed recall accuracy and precision under varying attentional and relevance conditions.

Main Results:

  • Items outside the FOA can be retrieved with increased precision if they remain behaviorally relevant.
  • Items deemed behaviorally unimportant, even if in WM, cannot be re-focused upon and may be lost.
  • Recall precision is modulated by the attentional state and contextual relevance of WM items.

Conclusions:

  • WM representations are flexible and context-dependent.
  • Behavioral relevance is a critical factor in maintaining WM item accessibility.
  • Findings support state-dependent models of working memory.