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Related Experiment Video

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Transcranial Direct Current Stimulation tDCS for Memory Enhancement
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Are there multiple ways to direct attention in working memory?

Amy L Atkinson1, Ed D J Berry1, Amanda H Waterman1

  • 1School of Psychology, University of Leeds, Leeds, United Kingdom.

Annals of the New York Academy of Sciences
|April 11, 2018
PubMed
Summary
This summary is machine-generated.

Value and frequency boosts enhance memory recall in visual working memory tasks. These effects are additive and independent, suggesting multiple attentional control mechanisms in working memory.

Keywords:
attentionfocus of attentionprioritizationprobe frequencyprobe valuevisual working memory

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Memory

Background:

  • Memory recall in visual working memory is influenced by item value.
  • Prioritization effects demonstrate that higher value items receive enhanced memory representation.
  • The impact of probe frequency on these prioritization effects remains underexplored.

Purpose of the Study:

  • To investigate whether probe value boosts in visual working memory are modulated by probe frequency.
  • To determine if value and frequency manipulations independently affect memory prioritization.
  • To examine the resource demands of probe frequency boosts compared to probe value boosts.

Main Methods:

  • Experiment 1: Participants performed a visual working memory task with sequential presentation of items (colored shapes).
  • Manipulations included differential/equal probe value and differential/equal probe frequency for the first item.
  • Experiment 2: Assessed the reliance of probe frequency boosts on executive resources.

Main Results:

  • Both probe value and probe frequency independently enhanced memory for the first item, with additive effects observed.
  • These boosts were accompanied by costs to the memory of other items.
  • Probe frequency boosts did not rely on executive resources, unlike probe value boosts.

Conclusions:

  • Value and frequency serve as independent mechanisms for directing attention within visual working memory.
  • The findings suggest multiple pathways for attentional control in working memory.
  • Understanding these distinct mechanisms advances theories of working memory and attention.