Flynn effect

is the increase in intelligence test scores in the world from roughly 1930 to the present day.

The Flynn effect is the substantial and long-sustained increase in both fluid and crystallized intelligence test scores measured in many parts of the world from roughly 1930 to the present day. When intelligence quotient (IQ) tests are initially standardized using a sample of test-takers, by convention the average of the test results is set to 100 and their standard deviation is set to 15 or 16 IQ points. (wikipedia)

flynn effect, n.Definitions

flynn effect