"Recent studies have reported a worrisome decline in IQ scores in Western nations over the last decades, a reversal of the once-hopeful Flynn Effect (named after the late philosopher and psychologist James R. Flynn) which posited a growth in cognitive abilities for much of the 20th Century.
Now the Flynn Effect seems to have reversed, leading to predictions of a general dumbing down of selective populations.
Other studies report that IQ erosion is not confined to this century but that IQ has dropped by an average of 14.1 percent over the last century.
As Evan Horowitz writes for NBC News, “A range of studies using a variety of well-established IQ tests and metrics have found declining scores across Scandinavia, Britain, Germany, France and Australia.”
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