Skip to content
Psychology

What is The Dunning-Kruger effect?

The Dunning-Kruger effect is a cognitive bias where people with little knowledge in an area overestimate their ability, while true experts often underestimate theirs. In short: the less you know, the more confident you can wrongly feel.

See it, don’t just read it.
Watch a 2-minute lesson with voice + animation that explains the dunning-kruger effect.
▶ Watch the visual lesson

Key things to understand

  • 1Beginners often overrate their competence.
  • 2They lack the knowledge to see their own mistakes.
  • 3Experts tend to underrate themselves, assuming things are obvious.
  • 4More learning usually brings more realistic self-assessment.

Frequently asked questions

What is the Dunning-Kruger effect?
A bias where people with limited knowledge overestimate their skill, while experts may underestimate theirs.
Why does the Dunning-Kruger effect happen?
The same lack of knowledge that causes mistakes also prevents people from recognizing those mistakes.
How do you avoid the Dunning-Kruger effect?
Seek feedback, keep learning, and stay humble about the limits of what you know.

Related topics