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Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions
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Look before you leap: sensory memory improves decision making.

Alexandra Vlassova1, Joel Pearson

  • 1University of New South Wales.

Psychological Science
|July 3, 2013
PubMed
Summary
This summary is machine-generated.

Delaying responses after visual stimuli can improve decision-making accuracy by allowing continued evidence accumulation. This effect is lost with sensory masking or high working memory load, suggesting a robust memory trace.

Keywords:
better decisionscognitive neurosciencedecision makingmemoryperception

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Area of Science:

  • Cognitive Neuroscience
  • Decision Making
  • Perception and Memory

Background:

  • Simple decisions involve processing information, forming a choice, and executing a response.
  • Evidence accumulation models suggest decisions are made when a threshold is reached.
  • The role of post-stimulus processing and memory in decision accuracy is not fully understood.

Purpose of the Study:

  • To investigate the effect of response delay on decision accuracy.
  • To examine how sensory masking and working memory load influence this effect.
  • To explore the relationship between evidence accumulation in perception and memory.

Main Methods:

  • Used a random-dot-motion stimulus to assess decision-making.
  • Manipulated the interval between stimulus offset and response.
  • Introduced sensory masking and concurrent working memory tasks.

Main Results:

  • Delaying responses significantly increased decision accuracy, even without new visual input.
  • Performance gains were eliminated by sensory masking or high working memory load.
  • Perceptual and memory evidence accumulation exhibited similar rates.

Conclusions:

  • Continued evidence accumulation can occur from a decaying memory trace after stimulus offset.
  • This suggests a high-capacity memory store supporting decision processes.
  • Memory inspection can be more beneficial than direct perception for decision accuracy in certain contexts.