The
Dunning–Kruger effect is a
cognitive bias in which relatively unskilled persons suffer
illusory superiority, mistakenly assessing their ability to be much higher than it really is. Dunning and Kruger attributed this bias to a
metacognitive inability of the unskilled to recognize their own ineptitude and evaluate their own ability accurately. Their research also suggests
corollaries: highly skilled individuals may underestimate their relative competence and may erroneously assume that tasks which are easy for them are also easy for others.