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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
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Working Memory Swap Errors Have Identifiable Neural Representations.

Remington Mallett1, Elizabeth S Lorenc1, Jarrod A Lewis-Peacock1

  • 1University of Texas at Austin.

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Summary
This summary is machine-generated.

Swap errors in visual working memory involve actively maintaining incorrect information, not just guessing. This suggests failures in selection or binding during memory recall.

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Working memory is crucial for goal-directed behavior but has limited capacity.
  • Errors in visual working memory include guesses and swaps, with the origin of swaps debated.

Purpose of the Study:

  • To investigate whether swap errors in visual working memory involve the active maintenance of incorrect items.
  • To differentiate between response-phase guessing and active maintenance of wrong information.

Main Methods:

  • Combined behavioral response modeling with functional magnetic resonance imaging (fMRI) pattern analysis.
  • Participants encoded six spatial locations, followed by a retro-cue indicating the tested item.
  • Analyzed neural representations in early visual cortex and intraparietal sulcus for accurate and swap error trials.

Main Results:

  • Accurate trials showed memory representations of the cued location.
  • Swap error trials revealed representations of the *swapped* location, not the cued one, indicating active maintenance of incorrect data.
  • Participants reported confidence on most swap error trials, suggesting more than random guessing.

Conclusions:

  • Swap errors in visual working memory stem from active maintenance of incorrect memory representations.
  • These errors may arise from selection failures, binding errors, or informed guessing, rather than simple response-phase errors.