1930 to the present day. 15 how to increase intelligence pdf 16 IQ points.
When IQ tests are revised, they are again standardized using a new sample of test-takers, usually born more recently than the first. Again, the average result is set to 100. However, when the new test subjects take the older tests, in almost every case their average scores are significantly above 100. Test score increases have been continuous and approximately linear from the earliest years of testing to the present. Improvements were remarkably consistent across the whole period, in both countries.
This effect of an apparent increase in IQ has also been observed in various other parts of the world, though the rates of increase vary. There are numerous proposed explanations of the Flynn effect, as well as some skepticism about its implications. Flynn effect continues in nations with lower average national IQs. Jim Flynn U of Otago. Although the general term for the phenomenon referring to no researcher in particular continues to be “secular rise in IQ scores”, many textbooks on psychology and IQ testing have now followed the lead of Herrnstein and Murray in calling the phenomenon the Flynn effect. IQ tests are updated periodically.