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Supported
Core Thinking
Overconfidence Bias
Social-cognitive biasDefinition
The tendency to overestimate your own abilities, knowledge, or the precision of your predictions.
Why it happens
Confidence feels good and is socially rewarded. Our brains prefer certainty over ambiguity, so we unconsciously inflate our sense of competence.
Real-life examples
- 93% of drivers believe they are above average — statistically impossible.
- Entrepreneurs consistently overestimate their chances of success.
- Students predicting they'll finish assignments earlier than they actually do.
How to counter it
- Assign a confidence percentage to your prediction and track accuracy.
- Seek out a second opinion, especially from someone with different expertise.
- Use pre-mortems: imagine your plan failed and list why.
- Review your past predictions honestly to calibrate your confidence.
Quick tips
- Track your predictions and review accuracy over time.
- Seek honest feedback from others regularly.
- Use confidence intervals instead of single-point estimates.
- Remember: expertise in one domain doesn't transfer to all domains.
Sources and further reading
- The Trouble with Overconfidence
American Psychological Association