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This document presents a meta-analysis of 271 studies from 31 countries that examined changes in intelligence test performance, known as the Flynn effect, from 1909-2013. The analysis found worldwide IQ gains across more than a century, with the largest annual gains in fluid intelligence (0.41 IQ points) and the smallest in crystallized intelligence (0.21 IQ points). Gains were stronger for adults than children and have decreased in more recent decades. Factors related to life history speed and social/econo

Author

contato.pavozzo

Language

EN