TEDxKids@Brussels - Gabe Zichermann - Gamification. Flynn effect. Flynn effect. Test score increases have been continuous and approximately linear from the earliest years of testing to the present.
For the Raven's Progressive Matrices test, subjects born over a 100-year period were compared in Des Moines, Iowa, and separately in Dumfries, Scotland. Improvements were remarkably consistent across the whole period, in both countries.[1] 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.[2] There are numerous proposed explanations of the Flynn effect, as well as some skepticism about its implications.