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.
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.
An IQ test used to determine whether Danish men are fit to serve in the military has revealed scores have fallen by 1.5 points since 1998.
And standard tests issued in the UK and Australia echo the results, according to journalist Bob Holmes, writing in New Scientist.
The most pessimistic explanation as to why humans seem to be becoming less intelligent is that we have effectively reached our intellectual peak.
Between the 1930s and 1980s, the average IQ score in the US rose by three points and in post-war Japan and Denmark, test scores also increased significantly – a trend known as the ‘Flynn effect’.