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This study reveals how working memory (WM) influences perception and vice versa. Visual attention shifts to remembered locations, but this effect is temporary, showing dynamic WM-perception interactions.

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Working Memory Research

Background:

  • Working memory (WM) and perception exhibit bidirectional crosstalk.
  • WM contents can alter ongoing percepts, and perceptual input can affect WM.

Purpose of the Study:

  • To investigate WM-perception interactions in a novel task setting.
  • To explore how spatial and color information in WM affects visual perception.

Main Methods:

  • Participants performed a visual discrimination task while maintaining location and color information in WM.
  • Spatiotemporally resolved psychometric functions were used to analyze perceptual sensitivity and biases.
  • Judgments of perceptual decisions and mnemonic reports were analyzed for biases.

Main Results:

  • Perceptual sensitivity was modulated by a bias of visual spatial attention towards the memorized location.
  • This attentional bias was transient, indicating rapid deprioritization of visuospatial WM information.
  • Bidirectional biases were observed in categorical color judgments, linking perceptual and mnemonic reports.
  • These biases occurred without a decrease in overall perceptual sensitivity.

Conclusions:

  • WM-perception crosstalk occurs at multiple processing levels, including sensory-perceptual and decisional stages.
  • Visuospatial WM information is dynamically prioritized and deprioritized during concurrent perception.
  • WM and perception exhibit mutual attraction in categorical judgments, extending previous findings.