It's just like the impression that people are going backwards in the process of evolution. Has human intelligence regressed or improved in recent years? Today's four seas scientific and technological exploration is to solve this mystery.
IQ tests in the UK, Denmark and Australia found that compared with the past 10 years, the IQ of these three countries showed a significant decline. Some scientists believe that human intelligence has reached its peak.
An IQ test in Denmark, which is used to test whether it is suitable to be a soldier, has dropped by 1.5 points since 1998, while similar results have been found in Britain and Australia.
But in fact, from the 1930s to the 1980s, the average IQ of the United States increased by three points, and Japan and Denmark also improved significantly after the war. This is called the Flynn effect because of the improvement of education and the improvement of quality of life. Experts believe that the 'Flynn effect' of developed countries has begun to move towards the end, because people in developed countries have reached the peak of IQ. Even pessimistic that educated people are relatively less children, which leads to the increase of offspring from the less intelligent people, so the IQ level will show a downward trend.
James Flynn, a scientist who proposed this effect, believes that people can improve the situation after receiving better education, and if the "Flynn effect" is really over, the level of IQ will not continue to decrease, and it should tend to a stable value. Even if human beings are really more and more stupid, better medical technology and services mean that everyone will have fewer children and IQ will adjust with itself.