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Marion Rouault1,2,3,4, Maël Lebreton1,2,5,6,7, Mathias Pessiglione1,2

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The brain computes confidence similarly across different cognitive tasks, suggesting a shared neural system for confidence judgments. This research explores how decision-making confidence is processed universally in the brain.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Decision Science

Background:

  • Confidence is a subjective judgment of decision accuracy.
  • Decisions rely on diverse information processed across brain systems.
  • It remains unclear if confidence computation is domain-general or domain-specific.

Purpose of the Study:

  • To investigate whether the brain computes confidence uniformly across different cognitive domains.
  • To compare confidence judgments derived from semantic memory and duration perception tasks.

Main Methods:

  • Human participants completed two tasks using identical historical and geographical statements.
  • Tasks involved semantic memory (truthfulness) and duration perception (length).
  • Functional magnetic resonance imaging (fMRI) was used to analyze neural activity.

Main Results:

  • Behavioral factors like task difficulty, accuracy, and response time predicted confidence in both tasks.
  • Neural imaging revealed shared brain regions associated with confidence judgments.
  • Positive correlation with ventromedial prefrontal cortex and negative correlation with a prefronto-parietal network were observed.

Conclusions:

  • Confidence judgments are generated by a shared brain system, operating similarly across distinct cognitive domains.
  • This suggests a unified neural mechanism underlies subjective confidence in decision-making.