Pre- and post-decision signals of certainty in changing minds

Area of Science:

• Neuroscience
• Cognitive Science
• Computational Neuroscience

Background:

• Understanding the neural mechanisms underlying confidence and decision-making is crucial.
• Metacognition, or thinking about one's own thinking, involves complex neural processes.
• Previous research has implicated various brain regions in decision-making, but the specific roles in confidence and change of mind are less clear.

Purpose of the Study:

• To investigate the neural basis of confidence and the process of changing one's mind.
• To identify the brain regions and neural dynamics involved in evidence accumulation for decisions.
• To reframe the understanding of metacognition as a distributed and dynamic neural process.

Main Methods:

• Combined computational modeling with intracranial recordings in a recent study.
• Analyzed neural signals related to evidence accumulation during decision-making.
• Investigated both pre-decisional and post-decisional neural activity.

Main Results:

• Revealed a temporally organized and spatially distributed hierarchy of evidence accumulation.
• Identified pre-decisional confidence signals in the pre-supplementary motor area (preSMA).
• Found post-decisional signals related to changes of mind in the insula.

Conclusions:

• Confidence and changes of mind arise from a distributed neural hierarchy.
• The preSMA and insula play distinct roles in pre- and post-decisional processes.
• Metacognition should be viewed as a dynamic and distributed neural function.