I think 'proven' constitutes a bit of a spin on the available evidence.
Interesting, it would be good to see why this might be the case in Norway. Besides fluoride.
oh its not just been shown in norway its happening across the west
Are we becoming more STUPID? IQ scores are decreasing - and some experts argue it's because humans have reached their intellectual peak
- IQs have largely increased since the 1930s thanks to better living conditions and education - a trend known as the Flynn effect
- But IQ test results suggest people in the UK, Denmark and Australia have become less intelligent in the past decade
- Opinion is divided as to whether the downwards trend is long-term
- Some studies have shown the average IQ of Westerners has plunged 10 points or more since Victorian times and others claim it will keep decreasing
- But other experts argue that even if we are becoming more stupid, better healthcare and technology means the 'problem' will regulate itself
Published: 14:50, 21 August 2014 | Updated: 15:42, 21 August 2014
Technology may be getting smarter, but humans are getting dumber, scientists have warned.
Evidence suggests that the IQs of people in the UK, Denmark and Australia have declined in the last decade.
Opinion is divided as to whether the trend is long-term, but some researchers believe that humans have already reached intellectual peak.
https://www.dailymail.co.uk/sciencetech/article-2730791/Are-STUPID-Britons-people-IQ-decline.html