Research has been conducted regularly for the past fifteen years. Some results of clustering of the student community according to the IQ criterion are given in the author’s work . Clustering was performed using the «Statgraphics Centurion» package. The first cluster brings together students with relatively low IQ values, the second group with medium values, and the third group with relatively high IQ values. Some of the results are presented in Table 3.4.
It is obvious that there is an increase in IQ over eight years by almost 19 % (18.7 %), which is much higher than the size of the «Flynn effect», which predicted an increase in this figure in the world by 14 % every ten years. The last century of research on the «Flynn effect» is really active around the world. The published results are often inconsistent, due to the incompatibility of generations, their incomparability in terms of historical conditions of existence, periodization, countries, features of the education system [24–27].
In addition, an analysis of the works of authors such as Jon Martin Sundet from the University of Oslo, Thomas Tisdale from the University of Copenhagen, psychologist Michael Shyer from the University of London, conducted by David Robson in an article on July 12, 2019 «Has humanity really reached the peak of intelligence and rapidly fooling around?» shows another version of the development of intelligence in the modern world .
He argues that the stage of growth of human intelligence is coming to an end. If we take the example of Finland, Norway and Denmark, the turning point occurred somewhere in the mid-1990s. After that, the average IQ score began to decline by about 0.2 points each year. Thus, the difference between the generations will be as much as 7 points. As David Robsonon points out, this can be partly explained by the fact that education now stimulates our brain a little less, at least it focuses on other skills.