The Dunning-Kruger Effect
Some studies find that people can misjudge performance, but the pattern is more nuanced than a slogan.
The Mechanism: The Dunning-Kruger effect refers to findings that people performing poorly on some tasks may overestimate their ability. The size and interpretation of the effect are debated, and measurement methods can contribute to the pattern.
The Philosophical Pivot: Self-knowledge depends partly on the standards and feedback available. A person may lack skill in a task without being globally incapable of recognizing uncertainty.
The Horizon: The concept can encourage calibration and feedback, but it is often misused as an insult aimed at people who disagree. That misuse protects the speaker from examining their own competence.
Experts can also misjudge their limits, and novices can know when they need help. Skill, confidence, and metacognition interact in context.
A useful theory should help people improve judgment, not provide a label for dismissing others.
A bias becomes another person's problem when we use it to excuse our own certainty.
What evidence would I accept about the limits of my own knowledge before using this effect to judge someone else?