Creator of the first practical IQ test
Appears in 1 story
Deceased (1911)
In 1932, the average American would have scored 70 on a modern IQ test—the threshold for intellectual disability. By 2013, that same population's raw performance had climbed by 30 points. A landmark 2015 meta-analysis examining 271 studies across 31 countries and nearly 4 million participants confirmed what psychologist James Flynn had argued for decades: IQ test scores have been rising steadily worldwide at roughly 3 points per decade throughout the 20th century.
Updated Jan 22
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