When it comes to success, a high IQ is not the biggest determining factor — it’s grit.

The latest challenge for social scientists, who have spent decades developing hard research on intelligence, is understanding this vaguely defined characteristic centered around tenacity and perseverance called grit. Although IQ is somewhat correlated with achievement, not letting setbacks discourage you is what will help get you ahead.

What implications does it have when it comes to education? While the liberal arts teach us to be well-rounded individuals, achievement seems to requires single-minded goals and pursuits. Those who choose goals and stay with them fare better than those who constantly try new pursuits.

“I’d bet that there isn’t a single highly successful person who hasn’t depended on grit,” says Angela Duckworth, a psychologist at the University of Pennsylvania who helped pioneer the study of grit. “Nobody is talented enough to not have to work hard, and that’s what grit allows you to do.”