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Dunning-Kruger effect 0:33
A 33-second explainer of Dunning-Kruger effect, narrated over the same demo you can try yourself.
Try the interactive Dunning-Kruger effect demo
What this video covers
The Dunning-Kruger effect is the gap between how good people think they are and how good they actually are - widest at the bottom, where knowing too little to spot your own mistakes leaves you oddly confident. The less you know, the less you know it.
You answered fast and felt sure - the question seemed easy. It seemed easy because you could not see what you were missing: the same gap that produced the wrong answer also hid that it was wrong. Real expertise tends to feel less certain, not more.
