A high IQ and a subway token will only get you into town

What Does IQ Really Measure?
April 25, 2011
http://news.sciencemag.org/2011/04/what-does-iq-really-measure

in his 2009 book “Intelligence and How to Get It,” Richard Nisbett, a psychologist at the University of Michigan, Ann Arbor, argued that differences in IQ scores largely disappear when researchers control for social and economic factors.

Nisbett agrees that the study is “tremendously important in its implications.”
Motivation, along with self-discipline, “are crucial,” Nisbett says.
“A high IQ and a subway token will only get you into town.”

Lex Borghans, an economist at the Maastricht University in the Netherlands, who has also studied the relationship between intelligence tests and economic success, says the new report shows that “both intelligence and personality matter.”
Even if native intelligence cannot be increased, Borghans says, “there might be other routes to success.”

this article is based on the original paper:
https://franzcalvo.wordpress.com/2014/07/11/intelligence-testing-role-of-test-motivation