The Dunning-Kruger Effect is a cognitive bias whereby poor performers tend to overestimate their competence in any given field. Sounds quite safe and bland doesn’t it? But to put it another way some people who know the least about something are convinced that they are an expert in it. So those least qualified to give an opinion can be the most convinced of their opinion. And the opposite is true too; in studies high performers tended to underestimate their exam results (although to a much lesser extent that the poor performers overestimate theirs).
“Ignorance more frequently begets confidence than does knowledge”, Charles Darwin
Why is this? Kruger and Dunning think that those who really suck at a subject are so bad that they lack the skills to realize just how bad they are. Also, because they…
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