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Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
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Published on: September 19, 2012

Confidence in value-based choice.

Benedetto De Martino1, Stephen M Fleming, Neil Garrett

  • 1Psychology and Language Sciences, University College London, London, UK. b.martino@ucl.ac.uk

Nature Neuroscience
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Summary
This summary is machine-generated.

Subjective confidence in decisions evolves with a decision variable, linking brain signals to metacognitive awareness. This study explores how confidence relates to accuracy, revealing insights into decision-making processes.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Decision Science

Background:

  • Decision-making involves subjective confidence, which fluctuates and impacts choice valuation.
  • The neural and behavioral mechanisms linking subjective confidence, value, and accuracy remain unclear.

Purpose of the Study:

  • To investigate the dynamic interaction between subjective confidence and value comparison in decision-making.
  • To identify the neural correlates of confidence in value comparison and its relation to accuracy.

Main Methods:

  • Developed a dynamic model of the decision process to link confidence, value, accuracy, and reaction time.
  • Utilized functional magnetic resonance imaging (fMRI) to measure brain activity, specifically in the ventromedial prefrontal cortex (vmPFC).
  • Assessed functional connectivity between vmPFC and rostrolateral prefrontal cortex (rlPFC) to predict metacognitive ability.

Main Results:

  • Confidence was shown to reflect the temporal evolution of a decision variable, explaining its relation to value, accuracy, and reaction time.
  • fMRI signals in vmPFC correlated with both value comparison and confidence in that comparison.
  • Individual differences in relating confidence to accuracy were predicted by vmPFC-rlPFC functional connectivity.

Conclusions:

  • Subjective confidence is mechanistically linked to the dynamics of value comparison and metacognitive awareness.
  • vmPFC plays a crucial role in both value comparison and confidence assessment.
  • Interactions between vmPFC and rlPFC underpin the ability to introspectively assess decision accuracy.