People with higher incomes also score higher on IQ-tests — up to a point. At high incomes the relationship plateaus and the top 1% score even slightly lower on the test than those whose incomes rank right below them. This suggests that one cannot infer high intelligence from high income, shows a new study from Linköping University published in the European Sociological Review.
The researchers combine wage data from Swedish population registers with scores from cognitive ability tests taken from military conscripts at age 18-19.
“This data trove permits us to test, for the first time,…
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News Source: www.sciencedaily.com