[l0t0b0r0s]

Heres the definition of heritability:

(HAYR-ih-tuh-BIH-lih-tee) The proportion of variation in a population trait that can be attributed to inherited genetic factors.

The study title is saying that heritability INCREASES with age: as you age your IQ is more closely correlated to the IQ of your parents from whom you inherited your genes from.

>As you point out a couple of comments later, genes don't change with age.

Your genes dont change but the correlation between you and your parents IQ does.

[tptacek]

You're not making sense. If heritability means genetic determination, as you say it does, and genes are fixed at birth, then heritability can't change as you age.

None of what you're being told is first-principles axiomatic reasoning. This is all stuff you can just go look up. You got so close with that Wikipedia definition of heritability! All you need to do now is understand what those words mean.