Dunning-Kruger Effect

A pattern of miscalibration in which lower performers can substantially overestimate their task performance or relative standing; its mechanisms and measurement remain debated.

The Dunning–Kruger effect concerns miscalibration between performance and self-assessment, especially substantial overestimation among low performers in particular tasks. Kruger and Dunning proposed that limited task skill can also impair evaluation of one's answers. Statistical effects, measurement choices, and alternative explanations remain part of the research debate.

It does not mean the least skilled person is always the most confident or that doubt proves expertise. Absolute scores, percentile estimates, and confidence are different measures. Use actual task evidence and repeated calibration to improve judgment; assigning the label to a disagreeing person contributes little without relevant performance data.

When to use it

When overconfidence in novices or underconfidence in experts is distorting judgment; when self-assessment needs calibration through external feedback; when hiring or evaluation needs to distinguish confidence from competence; when the relationship between expertise and certainty is counterintuitive.

How it can help

Compare predictions with relevant performance and feedback. Do not infer competence from either confidence or doubt.