![]() This graph represents a study of 1 million Swedish men. This is an uncomfortable one: According to the research, people with high IQs tend to be healthier and live longer than the rest of us. 2 ) Having a higher IQ protects you from death But no matter how it arises, the G-factor is real in the sense it can predict outcomes in our lives - how much money you'll make, how productive of a worker you might be, and, most chillingly, how likely you are to die an earlier death. Where or how "G" exists in the brain isn't well-understood. "The classic finding - I would say it is the most replicated finding in psychology - is that people who are good at one type of mental task tend to be good at them all," Ritchie says. Psychologists call this overlap of scores the "G," or general intelligence, factor. ![]() So your score on a task on how fast you can turn off a blinking light (one component of some intelligence tests) is correlated with your scores on verbal and spatial reasoning. What's fascinating is that people who score well on one of the tests tend to score well on them all. Just 2.2 percent have an IQ of 130 or greater. Most people you meet are probably average, and a few are extraordinarily smart. Like other variable human traits (height, for example), the range of IQ is on a standard curve bell curve. Those free quizzes you see online are not legitimate IQ tests. It needs to be administered by a trained tester, and certain portions are timed. Note: A full IQ test is an hour-plus, intense process. These sub-scores are totaled, and are then compared with those of the rest of the population. The first thing to know about IQ is that it is a composite score made up of the results of many different tests of reasoning, memory, acquired knowledge, and mental processing speed. It's a spry, uncluttered read if you're interested in learning more.) 1) Most people have average intelligence (Most of these charts have been pulled from Intelligence: All that Matters. Here are nine facts that help explain IQ and why it matters. And the truth is some people start ahead. In a new book, Intelligence: All that Matters, Ritchie persuasively argues that IQ doesn't necessarily set the limit for what we can do, but it does give us a starting point. (Richie and I go further into why IQ research makes some people uncomfortable in a Q&A here.) And psychologists have been able to replicate these findings over and over. But according to Stuart Ritchie, an intelligence researcher at the University of Edinburgh, there's a massive amount of data showing that it's one of the best predictors of someone's longevity, health, and prosperity. IQ is often dismissed as antiquated, misguided, or less important than personality traits. But there is one number that probably says a lot about you, whether you know it or not: your IQ, or intelligence quotient. (President Donald Trump recently bragged to Forbes that he would "win" if his IQ test score was compared to that of his Secretary of State, Rex Tillerson.)
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