I think it's more malleable than people give it credit for. Over time my performance on IQ tests changed from being much higher on math to much higher on verba

I think it's more malleable than people give it credit for. Over time my performance on IQ tests changed from being much higher on math to much higher on verbal. (I largely stopped reading for pleasure in high school, and didn't pick it up again until after college) I do agree with one point in the article - there is diminishing returns. I've heard Warren Buffett say that after someone is 130 IQ, it all comes down to character. I'm inclined to agree. If I interview someone with 130 IQ, I'd much rather they have integrity and good social skills than another 5 IQ points.