If You’re So Smart, Why Aren’t You Rich?

Science doesn’t have a definitive answer, although luck certainly plays a role. But another key factor is personality, according to a paper Heckman co-authored in the Proceedings of the National Academy of Sciences last month. He found financial success was correlated with conscientiousness, a personality trait marked by diligence, perseverance and self-discipline.

Even IQ tests, which were designed to assess innate problem-solving capabilities, appear to measure more than just smarts. In a 2011 study, University of Pennsylvania psychologist Angela Duckworth found that IQ scores also reflected test-takers’ motivation and effort. Diligent, motivated kids will work harder to answer tough questions than equally intelligent but lazier ones.

A newer study published this month in the journal Nature Human Behaviour focused on the flip side of success: hardship. After following some 1,000 New Zealanders for more than 30 years, researchers concluded that tests of language, behavioral skills and cognitive abilities taken when children were just three years old could predict who was most likely to need welfare, commit crimes, or become chronically ill.

The lead author of that paper, Duke University psychologist Terrie Moffitt, says she hopes the results would foster compassion and help, not stigma. Her results also suggested that helping people improve certain kinds of skills before they’re out of diapers would benefit everyone.