“The fool doth think he is wise, but the wise man knows himself to be a fool,” Shakespeare put it in “As You Like It. “ Indeed, stupid people overestimate their competence, while smart ones tend to underestimate it.
This wisdom is even backed up by science, specifically, by a Cornell University study done by David Dunning and Justin Kruger. This interesting phenomenon is now called the Dunning-Kruger effect.
Here are some signs that you are smarter than you realize:
1. You took music lessons
It has been scientifically shown that music helps children develop verbal intelligence, boost overall IQ, and enhance cognitive abilities.
2. You’re the oldest
Oldest siblings are smarter, but it isn’t because of genetics though. Namely, The new findings, from a landmark study published [in June 2007], showed that eldest children had a slight but significant edge in IQ — an average of three points over the closest sibling. And it found that the difference was not because of biological factors but the psychological interplay of parents and children,” The New York Times reports.
3. You’re thin
A 2006 study involving 2,200 adults has shown that the bigger the waistline, the lower the cognitive ability.
4. You have a cat
A 2014 study has found that “dog people” were more ongoing compared to “cat people”. Interestingly, the same cat people scored much higher on the test that measured cognitive ability.
5. You were breastfed
A 2007 research argues that babies who are breastfed are more likely to grow up in smart kids.
6. You’ve used recreational drugs
A 2012 study has found a link between high IQ in childhood and use of illegal drugs later in life.
“In our large population-based cohort study, IQ at 11 years was associated with a greater likelihood of using selected illegal drugs 31 years later,” wrote researchers James W. White, Catharine R. Gale, and David Batty.
They conclude that “in contrast to most studies on the association between childhood IQ and later health,” their findings suggest “a high childhood IQ may prompt the adoption of behaviors that are potentially harmful to health (i.e., excess alcohol consumption and drug use) in adulthood.”
7. You’re lefthanded
Left-handedness is associated with “divergent thinking,” a form of creativity that allows you to come up with novel ideas from a prompt.
8. You’re tall
A 2008 Princeton study found that taller people scored higher on IQ tests as kids.
9. You drink alcohol regularly
Satoshi Kanazawa and colleagues found that adults who had scored higher on IQ tests as kids drank more alcohol in adulthood.
10. You learned to read early
Back in 2012 researched looked at up t 2,000 identical twins and discovered that the one who had learned to read earlier scored higher on tests of cognitive ability.
11. You worry a lot
A study showed that people who tended to worry more and ruminate a lot scored higher on tests on verbal intelligence.
12. You’re funny
Smarter students were rated as funnier in a study that measured abstract reasoning abilities and verbal intelligence.
13. You’re curious
“It has not been as deeply studied as EQ and IQ, but there’s some evidence to suggest it is just as important when it comes to managing complexity in two major ways. First, individuals with higher CQ are generally more tolerant of ambiguity. This nuanced, sophisticated, subtle thinking style defines the very essence of complexity. Second, CQ leads to higher levels of intellectual investment and knowledge acquisition over time, especially in formal domains of education, such as science and art (note: this is, of course, different from IQ’s measurement of raw intellectual horsepower).”
14. You’re messy
It has been shown that working in untidy room fuels creativity.
15. You didn’t have sex until after high school
According to a study from the University of North Carolina Chapel Hill, High schoolers with higher IQs are more likely to be virgins than those with average IQs.
16. You’re a night owl
More intelligent individuals are more likely to stay up late as smarter people are more likely to “espouse evolutionarily novel values.”
17. You don’t always have to try hard
Smart individuals don’t always have to try as hard as “strivers” who fight to build up their skills.
18. You live in a ‘walkable’ city
Cities built for pedestrians tend to attract more college grads than cities built for cars.
19. You don’t constantly need to be around people
Smart people are different than the rest regarding happiness levels and socialization. They don’t constantly need to be around people.