Related Experiment Video
Updated: Jul 16, 2025
08:24
The Joint Effect of Social Comparison and Social Distance on Evaluation of Intertemporal Choice Outcomes in Event-related Potential Studies
Published on: August 25, 2023
742
Confidence is predicted by pre- and post-choice decision signal dynamics
John P Grogan1,2, Wouter Rys1, Simon P Kelly3
1School of Psychology, Trinity College Dublin, Dublin, Ireland.
Imaging Neuroscience (Cambridge, Mass.)
|September 18, 2023
Summary
Post-choice evidence accumulation, measured by electrophysiological signatures, continues when certainty is low, impacting choice confidence. This finding supports certainty-dependent stopping theories of decision-making.
Area of Science:
- Cognitive Neuroscience
- Decision-Making Research
- Electrophysiology
Background:
- Choice confidence is known to be affected by post-commitment evidence.
- The precise neural mechanisms of post-choice evidence sampling remain poorly understood.
Purpose of the Study:
- To investigate the electrophysiological dynamics of evidence accumulation and motor preparation after a choice.
- To determine how these neural signatures relate to confidence in perceptual decisions.
Main Methods:
- Traced electrophysiological signatures, including Centro-parietal Positivity (CPP) and mu/beta band activity, during pre- and post-choice periods.
- Analyzed neural data in relation to participants' confidence reports and decision outcomes, including changes of mind.
Main Results:
- Pre-choice CPP amplitudes correlated with confidence, even without immediate feedback.
- Post-choice, CPP showed sustained activity, particularly with lower certainty in the endorsed choice, regardless of decision changes.
- Lower certainty was associated with delayed motor preparation signals and slower confidence reports.
Conclusions:
- Findings support certainty-dependent stopping theories, where evidence accumulation persists until a confidence threshold is met.
- These results offer insights into the neural basis of choice confidence and decision-making processes.
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