Orbitofrontal cortex is required for optimal waiting based on decision confidence.

Area of Science:

• Neuroscience
• Cognitive Science
• Animal Behavior

Background:

• Confidence judgments are a key aspect of metacognition, reflecting knowledge of one's own cognitive processes.
• Previous research has identified neural correlates of decision confidence, but specific brain areas for confidence monitoring remain unclear.
• Metacognitive theories propose that confidence reports arise from a monitoring process evaluating the quality of internal representations.

Purpose of the Study:

• To investigate the neural basis of confidence monitoring.
• To determine if specific brain areas are essential for generating metacognitive reports of confidence.
• To identify the anatomical locus of confidence judgments distinct from perceptual decision-making processes.

Main Methods:

• A postdecision temporal wagering task was employed with rats to measure confidence.
• Rats expressed their confidence by choosing how long they would wait for a reward.
• Inactivation of the orbitofrontal cortex was performed to assess its role in confidence reporting.

Main Results:

• Inactivation of the orbitofrontal cortex significantly disrupted rats' confidence reports (waiting times).
• Decision accuracy remained unaffected by the orbitofrontal cortex inactivation.
• A normative model successfully quantified waiting times based on computed decision confidence.

Conclusions:

• The orbitofrontal cortex plays a critical role in generating metacognitive confidence reports.
• This finding establishes a distinct anatomical substrate for confidence judgments, separate from perceptual decision processes.
• The study provides evidence for a specific brain region involved in the monitoring aspect of metacognition.