Rising IQ in the Twenty-First Century

This bizarre finding—christened the “Flynn effect” by Richard Herrnstein and Charles Murray in The Bell Curve—has since snowballed so much supporting evidence that in 2007 Malcolm Gladwell declared in The New Yorker that “the Flynn effect has moved from theory to fact.” But researchers still cannot agree on why scores are going up. Are we are simply getting better at taking tests? Are the tests themselves a poor measure of intelligence? Or do rising IQ scores really mean we are getting smarter?

http://www.tnr.com/book/review/are-we-getting-smarter-rising-IQs-james-flynn#