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Attention allocation between item and order information in short-term memory.

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  • 1Université de Moncton, Moncton, New Brunswick, Canada.

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Participants can flexibly control attention in working memory for verbal lists, prioritizing item or order information. However, attention allocation shows an asymmetry, impacting order more than item recall.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Working Memory Research

Background:

  • Previous research indicates participants can prioritize encoding for either item or order information in verbal lists, but not both optimally.
  • This suggests a trade-off between item and order memory during encoding and retention.

Purpose of the Study:

  • To investigate whether participants can control attention to item and order information in a graded, flexible manner within working memory.
  • To examine the potential asymmetry in attention allocation between item and order processing.

Main Methods:

  • Participants completed verbal list tasks where the proportion of item or order test trials was manipulated (25%, 50%, 75%, 100%).
  • Two experiments utilized different item tests: fragment completion and free recall.

Main Results:

  • Participants demonstrated fine-grained attentional allocation based on trial distribution within blocks.
  • An asymmetry was observed: divided attention impaired order performance more significantly than item performance.
  • The degree of this asymmetry varied slightly depending on the specific item test used.

Conclusions:

  • Working memory likely utilizes a common resource for encoding and retaining both item and order information.
  • This resource can be voluntarily allocated in varying degrees to prioritize either item or order information.
  • The observed asymmetry suggests distinct processing demands or resource limitations for item versus order memory.