Children exposed to higher fluoride levels have lower IQs, a ... - CNN
3 days ago · A rigorous nine-year research review looking at the relationship between fluoride and intelligence in children concludes that as fluoride levels rise, IQ drops. Every 1 part per million increase ...
Roman Empire’s use of lead lowered IQ across Europe for 180 …
2 days ago · The intelligence quotient (IQ) of an average resident of the ancient civilization is likely to have fallen by 2.5 to 3 points as a result of exposure to the toxic metal, according to the paper, published in the Proceedings of the National Academy of Sciences on Monday.
What a new study does — and doesn’t - Los Angeles Times
3 days ago · A new report that analyzes research on fluoride and IQ scores finds that the more fluoride a child is exposed to, the lower he or she tends to score on intelligence tests. The findings' relevance ...
Is IQ overrated? Why some psychologists say it's better to measure ...
Dec 28, 2024 · Psychologist Howard Gardner, a research professor at Harvard University, argues that the famous so-called “intelligence quotient” tests pioneered by French psychologist Alfred Binet and French...
What is IQ — and how much does it matter? - Science News …
Oct 13, 2016 · IQ, short for intelligence quotient, is a measure of a person’s reasoning ability. In short, it is supposed to gauge how well someone can use information and logic to answer questions or make predictions. IQ tests begin to assess this by measuring short- …
Map Shows Which States Have the Highest IQs - Newsweek
Aug 1, 2024 · A map reveals the U.S. states with the highest IQs, giving a glimpse into the country's intellectual fabric and the factors influencing American intelligence.
Bad News for the Highly Intelligent | Scientific American
Dec 5, 2017 · Now there’s some bad news for people in the right tail of the IQ bell curve. In a study just published in the journal Intelligence, Pitzer College researcher Ruth Karpinski and her colleagues...
Americans’ IQ scores are lower in some areas, higher in one
Mar 20, 2023 · IQ scores have substantially increased from 1932 through the 20th century, with differences ranging from three to five IQ points per decade, according to a phenomenon known as the “Flynn effect.”
IQ Scores Are Falling in "Worrying" Reversal of 20th Century ...
Jun 13, 2018 · A defining trend in human intelligence tests that saw people steadily obtaining higher IQ scores through the 20th century has abruptly ended, a new study shows. The Flynn effect – named after the work of Kiwi intelligence researcher James Flynn – observed rapid rises in intelligence quotient at a rate of about 3 IQ points per decade in the ...
Online tests suggest IQ scores in US dropped for the first time in ...
Mar 10, 2023 · In short, the effect suggests that the human race grows smarter with each successive generation—the average intelligence quotient (IQ) increases. Prior research has bolstered this theory,...