I dont know because I already know that the white invented IQ is a farce to make whites feel good. The way I see it is how is a white person going to tell me how smart I am when they are a dumb race to begin with? Besides even other whites have shot down the IQ theory. Whites arent smart enough to measure intelligence.
IQ is a measurement of how well a person will perform in academia. Period. I worked with a woman with a very high IQ and a Ph.D. who couldn't figure out for the life of her how to operate a 5 button business phone (remember them, with the lit buttons on the bottom?).
IQ doesn't measure determination, ingenuity or plain old common sense. It doesn't mean much unless you're in school and people really ought to stop acting as if it means something major.
I've read studies that IQ of blacks who leave the inner city rise, but in the second or third generation and they think it has more to do with parenting styles. It's still early days on those studies. IQ is certainly at least partly environmental. Not being exposed to lead is a help, as well.
IQ is a maximum baseline at birth. Then environment, and nutrition play their part in lowering it.
How on earth did they IQ test newborns to get that theory?
They didn't. Genetics is going to give you your top level of intelligence. We KNOW that the older you get, the lower your IQ becomes.
Geniuses do their best work before they are 30. After that their creativity slows. We KNOW this.
Therefore, IQ is set at birth. Environmental conditions, family life, and nutrition all work to lower the IQ from that moment on.
That's why you can take a not smart person, move them to a first world country and their grand children are always smarter.
The last 150 years has seen IQ levels increase in the first world mainly thanks to nutrition.