Confirmation Bias
What is Confirmation Bias?
The tendency to search for, interpret, favor, and recall information in a way that confirms or supports one's prior beliefs or values.
Quick Answer
Confirmation bias is the tendency to seek, interpret, and remember information that confirms what you already believe while ignoring or dismissing contradictory evidence.
Scientific Background
One of the most robust and well-documented cognitive biases. It affects how we seek information (preferring confirming sources), interpret ambiguous data (seeing what we expect), and remember events (recalling confirming instances).
How to Measure
Demonstrated through experimental tasks showing preferential processing of belief-consistent information. Information search studies show biased question selection.
Real-World Implications
- Major factor in political polarization and echo chambers
- Explains why smart people can hold demonstrably false beliefs
- Affects scientific thinking—even experts are susceptible
- Can be partially countered by actively seeking disconfirming evidence
Common Misconceptions
- Confirmation bias isn't conscious dishonesty—it's automatic and universal
- Intelligence doesn't protect against it—smart people rationalize better
- Being aware of it helps but doesn't eliminate it
Related Concepts
Related Definitions
Quick Facts
- CategoryCognitive
- MeasurableYes
- TrainableAwareness helps
- Related Tests2
Explore Other Categories
Sources
- American Psychological Association (APA)
- Peer-Reviewed Research Literature
- Psychometric Assessment Standards
- Handbook of Personality Psychology
References & Sources
Nisbett, R. E. (2015). Mindware: Tools for Smart Thinking. New York: Farrar, Straus and Giroux.
Sternberg, R. J. (2020). The Cambridge Handbook of Intelligence (2nd ed.). Cambridge University Press.
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Confirmation Bias: Frequently Asked Questions
What is confirmation bias?+
Confirmation bias is the tendency to seek, interpret, and remember information that confirms what you already believe while ignoring or dismissing contradictory evidence.
Why do we have confirmation bias?+
It's cognitively efficient to maintain existing beliefs rather than constantly re-evaluating. Our brains are prediction machines that resist updating established models.
How can you overcome confirmation bias?+
Actively seek out opposing viewpoints, ask "what would change my mind?", steelman opposing arguments, and cultivate intellectual humility.
Does confirmation bias affect everyone?+
Yes, it's universal. Intelligence doesn't protect against it—in fact, smart people may be better at rationalizing biased conclusions.
How does confirmation bias affect decisions?+
It leads to overconfidence, poor risk assessment, and failure to update beliefs with new evidence. It can trap you in suboptimal strategies.
