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Author Spotlight: Exploring the Link Between Time Perception of Visual Stimuli and Reading Skills
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Assessing the interaction between working memory and perception through time.

Chunyue Teng1, Simon M Kaplan2, Sarah Shomstein2

  • 1Department of Neuroscience, Lawrence University, Appleton, WI, USA. chunyue.teng@lawrence.edu.

Attention, Perception & Psychophysics
|September 22, 2023
PubMed
Summary
This summary is machine-generated.

Visual working memory representations persist as sensory codes, influencing perception over time. This sensory code decays, increasing interference from ongoing visual perception.

Keywords:
AttentionVisual perceptionVisual working memory

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Working Memory

Background:

  • Visual working memory (VWM) interacts with visual processing, potentially using shared neural representations.
  • The nature of VWM representations (sensory vs. abstract code) and their temporal dynamics remain debated.

Purpose of the Study:

  • To investigate whether VWM representations decay as sensory codes or are recoded into abstract codes over time.
  • To differentiate between temporal decay + visual code and temporal decay + abstract code models of VWM-perception interaction.

Main Methods:

  • Manipulated the inter-stimulus interval (ISI) between VWM encoding and a perceptual discrimination task.
  • Measured changes in discrimination thresholds and VWM report biases as a function of time and information relevance.

Main Results:

  • Task-relevant VWM information modulated perceptual discrimination for up to 4 seconds, while irrelevant information had transient effects.
  • Discrimination threshold effects decreased over time, whereas VWM report biases increased, indicating opposing temporal dynamics.
  • These opposing effects support a visual code account where decaying sensory representations interfere with perception.

Conclusions:

  • VWM representations are likely maintained as sensory codes that decay over time.
  • The readout of VWM relies on these sensory representations, leading to increased interference from concurrent perception as they decay.