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Re:“I paid $25 for an Invisible Boyfriend, and I think I mig... by allendoerfer on Saturday January 24, 2015 @07:41AM (#8939452)
The reverse is true, too: Want better performance than people of the same age? Have had more training than them.

I suspect this applies especially to language or logic related tasks.

We will likely never find out, variance seems to be extremely high, while the actual differences are very low.

Re:“I paid $25 for an Invisible Boyfriend, and I think I mig... by eru on Sunday January 25, 2015 @07:42PM (#8944952)
There are actual studies. Lots of professional athletes were in the older part of their cohort when they were younger. So the effect Terr_ described seems to outweigh the one you describe.