[dfwgator]

Nature vs nurture.The age old dilemma.This could just as easily be a genetic thing."Rich" parents are most likely to have substantially higher IQ's than "poor" parents.And studies show that IQ has a substantial genetic component.

Would you like to make a bet on that?

[Myrddin]

The "twin" studies show identical twins have the same IQ independent of how or where they were raised. When they don't have the same IQ, there is good explanation. Typically, the lower IQ twin will also be the one with lower birth weight. That has been traced to placental defects where the lower birth weight twin was getting blood that had already passed through the heavier twin. Disease and physical damage after birth are also common reasons to find a difference. Absent any negative influences, twins will have the same IQ scores within 5%...that is the limit of accuracy/repeatability of the Stanford-Binet IQ tests.