This is more commonly know, but does not fit into wikipedia agenda:
>Wicherts also points out international evidence that average IQs can rise dramatically over time — by as much as 20 points in the Netherlands between 1952 and 1982, for example. In fact, Africa’s current estimated "average IQ" is about the same as Britain’s in 1948. The phenomenon of rising average IQ scores over time is known as the "Flynn effect," named after political scientist Jim Flynn, who popularized the result.
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[ 3.0 ms ] story [ 16.0 ms ] thread>Wicherts also points out international evidence that average IQs can rise dramatically over time — by as much as 20 points in the Netherlands between 1952 and 1982, for example. In fact, Africa’s current estimated "average IQ" is about the same as Britain’s in 1948. The phenomenon of rising average IQ scores over time is known as the "Flynn effect," named after political scientist Jim Flynn, who popularized the result.