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On the positive relationship between breastfeeding & intelligence.

Brian B Boutwell1, Jacob T N Young2, Ryan C Meldrum3

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Breastfeeding for six months is linked to higher childhood intelligence, but the effect is small. This study controlled for key factors like maternal intelligence and education.

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Area of Science:

  • Developmental Psychology
  • Pediatrics
  • Cognitive Science

Background:

  • Existing research suggests a link between breastfeeding and improved childhood cognitive abilities.
  • Fewer studies have adequately controlled for confounding variables such as maternal intelligence, education, and home environment.

Purpose of the Study:

  • To investigate the association between breastfeeding and intelligence in a large national sample.
  • To control for significant covariates potentially influencing the breastfeeding-intelligence relationship.

Main Methods:

  • Analysis of a national sample of approximately 790 American respondents.
  • Utilized multiple intelligence tests to assess cognitive abilities.
  • Employed statistical methods to control for key confounding variables.

Main Results:

  • A statistically significant and consistent correlation was found between breastfeeding during the first six months and intelligence.
  • The observed impact of breastfeeding on intelligence was substantively minor, despite statistical significance.

Conclusions:

  • Breastfeeding shows a small but significant positive association with intelligence in childhood and adolescence.
  • The findings underscore the importance of controlling for confounding factors in breastfeeding research.