The mean IQ of Americans: Massive gains 1932 to 1978.

  title={The mean IQ of Americans: Massive gains 1932 to 1978.},
  author={James Robert Flynn},
  journal={Psychological Bulletin},
  • J. Flynn
  • Published 1984
  • Psychology
  • Psychological Bulletin
This study shows that every Stanford-Binet and Wechsler standardization sample from 1932 to 1978 established norms of a higher standard than its predecessor. The obvious interpretation of this pattern is that representative samples of Americans did better and better on IQ tests over a period of 46 years, the total gain amounting to a rise in mean IQ of 13.8 points. The implications of this finding are developed: The combination of IQ gains and the decline in Scholastic Aptitude Test scores… Expand
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