# \#flynn-effect

**URL:** https://scanalyst.fourmilab.ch/tag/flynn-effect/3889.md

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## [Reverse Flynn Effect: U.S. Adult IQ Is Declining](https://scanalyst.fourmilab.ch/t/reverse-flynn-effect-u-s-adult-iq-is-declining/2828)

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**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Replies:** 5\
**Last updated:** [7 March 2023 16:59 UTC](https://scanalyst.fourmilab.ch/t/reverse-flynn-effect-u-s-adult-iq-is-declining/2828 "2023-03-07T16:59:02Z")

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As noted in Edward Dutton and Michael Woodley’s book, At Our Wits’ End, the Flynn effect, in which intelligence, as measured by IQ test scores, was observed to have risen rapidly during the 20th century among a broadly-b…