The Dunning-Kruger Effect: Why Incompetent People Think They're Experts

The Dunning-Kruger effect describes how people with low ability overestimate their competence, while experts underestimate theirs. The mechanism: incompetence removes the very skills needed to recognize incompetence. Low-skill individuals reach 'Mount Stupid' (peak confidence) before experience brings them to 'Valley of Despair.' High-skill individuals underrate themselves because they're aware of how much they don't know. Implications: hiring, management, investing, and self-assessment are all affected. Meta-analysis shows the effect is real but sometimes overstated in pop psychology. The practical lesson: assume you know less than you think, especially in areas where you have some knowledge but not deep expertise.