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More Schooling Might Raise IQ
Date:12/27/2011

By Steven Reinberg
HealthDay Reporter

MONDAY, Dec. 26 (HealthDay News) -- Children who have more schooling may see their IQ improve, Norwegian researchers have found.

Although time spent in school has been linked with IQ, earlier studies did not rule out the possibility that people with higher IQs might simply be likelier to get more education than others, the researchers noted.

Now, however, "there is good evidence to support the notion that schooling does make you 'smarter' in some general relevant way as measured by IQ tests," said study author Taryn Galloway, a researcher at Statistics Norway in Oslo.

Findings from the large-scale study appear in this week's online edition of the Proceedings of the National Academy of Sciences.

IQ, or intelligence quotient, is a widely accepted measure of intelligence. The IQ score comes from several combined, standardized tests.

In 1955, Norway began extending compulsory middle school education by two years. Galloway and her colleague Christian Brinch, from the department of economics at the University of Oslo, analyzed how this additional schooling might affect IQ.

Using data on men born between 1950 and 1958, the researchers looked at the level of schooling by age 30. They also looked at IQ scores of the men when they were 19.

"The size of the effect was quite large," she said. Comparing IQ scores before and after the education reform, the average increased by 0.6 points, which correlated with an increase in IQ of 3.7 points for an addition year of schooling, Galloway said.

"We are only able to study men, because we use data on IQ from the Norwegian military's draft assessment, which basically all men undergo around the age of 19. Women are not included in the draft," she explained.

Education has lasting effects on cognitive skills, such as those broadly measured by IQ tests, Galloway said.

"Cognitive skills are, in tu
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