Justin S. Kruger is an American social psychologist and professor at the New York University Stern School of Business.
He then received his PhD in social psychology from Cornell University in 1999.
[4] The Dunning-Kruger effect, a cognitive bias, suggests that poor performers often overestimate their abilities, while skilled individuals tend to underestimate their abilities.
[5] This study showed that people who performed in the lowest at certain tasks, such as judging humor, grammar, and logic, significantly overestimated how good they were at these tasks.
This study has since given rise to what is known as the Dunning–Kruger effect, a form of cognitive bias where persons with low ability in a particular task experience a sense of illusory superiority.