There is one question about yourself that you are built to get wrong, and asking it harder does not help.

McArthur Wheeler robbed 2 Pittsburgh banks in 1995 with his face coated in lemon juice, fully expecting the security cameras to miss him. The reason he is worth your time is not that he was wrong. It is that he checked. He had a theory, he tested it, and the test came back saying he was fine.

That case eventually reached David Dunning at Cornell, who handed it to his graduate student, Justin Kruger. The study they published in 1999 is now one of the most quoted and least understood results in psychology.

The part almost nobody repeats is the part that should unsettle you.

Spotting an error and avoiding it in the first place run on identical equipment. Lose one and you have already lost the other, which is why the failure hides itself so well.

What this covers:

- Why judging any skill requires the exact skill you might be missing
- The 1999 experiment on grammar, logic and humor, and what the lowest scorers believed about their own results
- Why the 93% of drivers who rate themselves above average cannot all be right
- Why asking other people quietly fails as well
- The finding that turns the whole thing inside out: what the highest scorers guessed about themselves
- Why the most certain voice in a room is so often the least reliable one
- What Socrates concluded about his own wisdom, and why it had nothing to do with knowing more

Certainty is not proof of anything. It never was.

And the quiet suspicion that you might be getting something badly wrong is worth more than any confidence you will ever feel.

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❤️ I make these alone, please like this video if you have the time. If not, no problem. I will see you in the next one.

- Zenn

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S O U R C E S

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THE ORIGINAL STUDY

Kruger, J., & Dunning, D. (1999). "Unskilled and Unaware of It: How Difficulties in Recognizing One's Own Incompetence Lead to Inflated Self-Assessments." Journal of Personality and Social Psychology, 77(6), 1121-1134.

The paper behind the effect, containing the grammar, logic and humor tests and the percentile estimates given by the highest and lowest scorers.

THE BANK ROBBERY

Fuocco, M. A. (1996). "Trial and Error: They Had Larceny in Their Hearts, But Little in Their Heads." Pittsburgh Post-Gazette, March 21, 1996.

Contemporary newspaper reporting on the Wheeler case, the coverage that first put the story in front of researchers.

DRIVERS RATING THEMSELVES

Svenson, O. (1981). "Are We All Less Risky and More Skillful Than Our Fellow Drivers?" Acta Psychologica, 47(2), 143-148.

Where the widely quoted driving figure originates, comparing how American and Swedish drivers ranked themselves against everyone else on the road.

DUNNING ON HIS OWN FINDING

Dunning, D. (2011). "The Dunning-Kruger Effect: On Being Ignorant of One's Own Ignorance." Advances in Experimental Social Psychology, 44, 247-296.

Dunning revisiting the work more than a decade later, with the clearest account of why the blindness is built into the incompetence itself.

SOCRATES

Plato. "Apology." Written approximately 399-387 BC.

The trial account containing the claim about wisdom and self knowledge referenced at the end of this video.

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#psychology #documentary #humanbehavior #dunningkruger #cognitivebias