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Related Experiment Videos

Prior expectations modulate unconscious evidence accumulation.

Leonardo S Barbosa1, Alexandra Vlassova2, Sid Kouider2

  • 1Brain and Consciousness Group (ENS, EHESS, CNRS), École Normale Supérieure - PSL Research University, Paris, France; École Doctorale Cerveau Cognition Comportement, Université Pierre et Marie Curie, Paris, France.

Consciousness and Cognition
|April 16, 2017
PubMed
Summary
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Unconscious decision-making processes can adapt to environmental statistics, optimizing behavior. This study shows unconscious evidence accumulation flexibly adjusts to sensory information utility, leading to faster choices.

Area of Science:

  • Cognitive Neuroscience
  • Decision Science

Background:

  • Unconscious processes influence perception and behavior.
  • The adaptability of unconscious decision-making remains largely unexplored.

Purpose of the Study:

  • To investigate if unconscious decisional processes adapt to the utility of sensory information.
  • To determine if environmental statistics can modulate unconscious evidence accumulation.

Main Methods:

  • Participants accumulated evidence from noisy motion stimuli.
  • Conscious awareness was manipulated using a dynamic dichoptic mask.
  • The utility of suppressed sensory information was experimentally varied.

Main Results:

  • Unconscious evidence accumulation was modulated by environmental statistics.

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  • This modulation led to significantly faster decision-making.
  • Computational modeling indicated a change in unconscious evidence quality, not conscious strategy.

    • Conclusions:

    • Unconscious decision-making mechanisms exhibit flexibility.
    • These mechanisms can optimize performance by adapting to statistical environmental regularities.