In 1900, only 3% of Americans practiced professions that were deemed "cognitively demanding." Today, 35% of us do, and we have all learned to be flexible in ... Why our IQ levels are higher than our grandparents' | James Flynn - Action.News ABC Action News Santa Barbara Calgary WestNet-HD Weather Traffic

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Why our IQ levels are higher than our grandparents' | James Flynn
In 1900, only 3% of Americans practiced professions that were deemed "cognitively demanding." Today, 35% of us do, and we have all learned to be flexible in ...

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