Anxiety Linked to High IQ

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Excessive worry might not be such a bad thing after all — a new small study suggests that such anxiety may have evolved in people along with intelligence.

The results show, among people diagnosed with generalized anxiety disorder, high IQ scores were associated with high levels of worry.

Although we tend to view anxiety as not being good for us, it is linked with intelligence — a highly adaptive trait, said Dr. Jeremy Coplan, study researcher and professor of psychiatry at State University of New York Downstate Medical Center.

High levels of anxiety can be disabling, and patients' worries are often irrational, Coplan said. But "every so often there's a wild-card danger. Then, that excessive worry becomes highly adaptive," Coplan said.

"People who act on the signals of that wild-card danger are likely to preserve their lives and the lives of their offspring," Coplan said.

Because the study was small, more research is needed to confirm the findings.

Anxiety and intelligence

In the study, 26 patients with anxiety disorder and 18 healthy people completed an IQ test, along with a questionnaire to assess their level of worry.

Among the participants with anxiety disorders, the higher their worry level, the greater their IQ score was.

Interestingly, the opposite was seen in healthy patients: those with high IQ scores tended to have low levels of worry, and those with low IQ scores tended to have high levels of worry — a finding that agrees with earlier research.

Not enough worry

Too little worry can be problematic for individuals and society, Coplan said. Some people are "incapable of seeing any danger, even when danger is imminent, he said.

"If these folks are in positions as leaders, they are going to indicate to the general populace that there's no need to worry," Coplan said. In some situations, like the recent real estate bubble, that lack of worry can have societal consequences, he said.

The study was published Feb. 1 in the journal Frontiers in Evolutionary Neuroscience.

Pass it on:  In some situations, excessive worrying is advantageous, and the trait may have co-evolved with intelligence.

Follow MyHealthNewsDaily staff writer Rachael Rettner on Twitter @RachaelRettner. Find  us on Facebook.

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Rachael Rettner
Rachael Rettner
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Rachael is a Live Science contributor, and was a former channel editor and senior writer for Live Science between 2010 and 2022. She has a master's degree in journalism from New York University's Science, Health and Environmental Reporting Program. She also holds a B.S. in molecular biology and an M.S. in biology from the University of California, San Diego. Her work has appeared in Scienceline, The Washington Post and Scientific American.