IQ

Children

"There are a host of things that go into IQ," he said. "This is one that is obviously negative, but if you also have a nurturing home environment, that helped your IQ."
2000 ABC News - Court OKs Barring High IQs for Cops
2022 NBC News - Lead from gasoline blunted the IQ of about half the U.S. population, study says - Leaded gas was banned in 1996, but exposure to the poison cost people born before then several IQ points on average, researchers estimated.
2023 TCR - Suppressed Documents Show Scientists with U.S. Government Find Fluoride Lowers IQ in Children
High IQ Societies
IQ Tests (Intelligence quotient)
Watson has repeatedly asserted that differences in average measured IQ between blacks and whites are due to genetics.