Intelligence, Birth Order, and Family Size

@article{Kanazawa2012IntelligenceBO,
  title={Intelligence, Birth Order, and Family Size},
  author={Satoshi Kanazawa},
  journal={Personality and Social Psychology Bulletin},
  year={2012},
  volume={38},
  pages={1157 - 1164}
}
  • S. Kanazawa
  • Published 10 May 2012
  • Psychology
  • Personality and Social Psychology Bulletin
The analysis of the National Child Development Study in the United Kingdom (n = 17,419) replicates some earlier findings and shows that genuine within-family data are not necessary to make the apparent birth-order effect on intelligence disappear. Birth order is not associated with intelligence in between-family data once the number of siblings is statistically controlled. The analyses support the admixture hypothesis, which avers that the apparent birth-order effect on intelligence is an… 

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