Human Growth and Development / Unit 7 HGD 0939 short lesson, about 20 seconds
The Flynn Effect
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The idea
The Flynn effect is the rise in intelligence test scores over past decades, about three points per decade, with environmental causes.
In practice
Better nutrition, more familiarity with testing and more access to information among the proposed explanations.
Where people slip
The rise has reversed in some countries, and whether people are actually getting smarter remains debated.
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