There is no IQ threshold effect, also not for income
We've been over this before, but it's a perennial topic. People like to claim that beyond a certain level of intelligence, additional intelligence doesn't help to get X, where X…
Gladwell, the threshold effect for IQ, and Jensen
I don't think Malcolm Gladwell has been debunked hard enough, so here's my contribution towards that goal. For Steven Pinker's take, see here. Gladwell is essentially a story teller, and…