The Flynn effect refers to the fact that IQ scores have increased from generation to generation in modernized countries.
<h3>What is the Flynn effect?</h3>
The Flynn effect is a term used to describe a secular rise in population IQ that was seen over the course of the 20th century. The changes happened quickly, with an average IQ point increase of three every decade for assessed intellect. The rise appeared to defy the old theory that IQs were dropping because of so-called dysgenic fertility, which is the negative relationship between IQ and fertility.
There has been concern that the Flynn effect was a transitory phenomenon reflecting an IQ boost from environmental factors that temporarily concealed an underlying dysgenic trend as the Flynn effect has recently decreased and reversed in various Western countries.
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