If the IQ of the children is similar to the parents, how are people with high IQ born? Are they abnormalities? Also from what I gather on the whole the average IQ of the world is increasing, how is that explained?
>Also from what I gather on the whole the average IQ of the world is increasing, how is that explained?
Lots of factors impact IQ besides genetics. Education, nutrition, and environment are huge factors.
If you take two newborns and lock one in a dark cage, and raise the other with everything the world has to offer, you will see differences on IQ tests.
This isn't evidence that IQ doesn't exist. IQ is just one measure of applied thought and reasoning so you would expect it to track anything that affects those attributes.
It's random, with a mean that is correlated to the parents IQ. Just like height or any other number of other genetic traits.
> Are they abnormalities?
Yes.
> the average IQ of the world is increasing, how is that explained?
There are many different explanations. The biggest is that environmental factors that lower IQ such as malnourishment are decreasing. Another is that IQ is now more highly valued making high IQ individuals more fit to reproduce.
