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Retrospective Attention Interacts with Stimulus Strength to Shape Working Memory Performance.

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Retrospective attention cues benefit working memory (WM) performance for strong stimuli but not weak ones. Cueing improves memory precision for high-contrast items and reduces errors for low-contrast items.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience

Background:

  • Orienting attention retrospectively to working memory (WM) contents affects performance.
  • Stimulus strength influences perceptual representations, but its impact on WM and interaction with retrospective attention is less understood.

Purpose of the Study:

  • Investigate how stimulus strength during encoding impacts WM performance.
  • Examine if retrospective attention effects vary with stimulus strength.

Main Methods:

  • Three experiments using a continuous-recall WM task.
  • Manipulation of stimulus contrast (strength) during encoding.
  • Application of a mixture-model approach to analyze WM error sources.

Main Results:

  • Retrocueing benefits were observed for supraliminal but not sub-threshold stimuli.
  • For high-contrast stimuli, retrocues enhanced memory precision.
  • For low-contrast stimuli, retrocues reduced the likelihood of confusing targets with distractors.

Conclusions:

  • Retrospective attentional orienting effects on WM performance are contingent on the quality of WM representations.
  • WM representation quality is determined by stimulus strength during encoding.