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American IQs rose 30 points in the last century. Now, they may be falling.

(The Hill) — A new study of human intelligence posits a narrative that may surprise the general public: American IQs rose dramatically over the past century, and now they seem to be falling.

Cognitive abilities declined between 2006 and 2018 across three of four broad domains of intelligence, the study found. Researchers tracked falling scores in logic, vocabulary, visual and mathematical problem-solving and analogies, the latter category familiar to anyone who took the old SAT.

In the 12-year span, IQ scores dipped up to 2 points in the three areas of declining performance.

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