Omega-3 fish oil, good preschool, and reading with parents were the 3 factors credibly linked to higher IQs
- Participants were normal, healthy children.
- IQ was assessed using widely accepted measures of intelligence.
- The interventions (fish oil, school, reading, etc.) were tested over a significant time.
- All studies were controlled clinical trials, with participants selected at random to receive one of the interventions.
- Giving pregnant women and newborns omega-3 fish oil boosted children's IQ by more than 3.5 points.
- Enrolling an economically disadvantaged child into an early education program raised his or her IQ by more than four points; programs with a language focus raised a child's IQ by more than seven points.
- Interactive reading – in which parents engage their children while reading with them – was linked to an IQ score over six points higher than the control group. Interactive reading did not measurably help children over four years old.
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- Helland IB, Smith L, Blomén B, Saarem K, Saugstad OD, Drevon CA. Effect of supplementing pregnant and lactating mothers with n-3 very-long-chain fatty acids on children's IQ and body mass index at 7 years of age. Pediatrics. 2008 Aug;122(2):e472-9. doi: 10.1542/peds.2007-2762.
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- Isaacs EB, Ross S, Kennedy K, Weaver LT, Lucas A, Fewtrell MS. 10-year cognition in preterms after random assignment to fatty acid supplementation in infancy. Pediatrics. 2011 Oct;128(4):e890-8. doi: 10.1542/peds.2010-3153. Epub 2011 Sep 19.
- New York University (NYU). With New Intelligence Database, NYU Steinhardt Researchers Show Diet, Parental Behavior and Preschool Can Boost Children's IQ. January 25, 2013. Accessed at http://www.nyu.edu/about/news-publications/news/2013/01/25/with-new-intelligence-database-nyu-steinhardt-researchers-show-diet-parental-behavior-and-preschool-can-boost-childrens-iq.html
- Protzko J, AronsonJ, Blair C. How to Make a Young Child Smarter: Evidence From the Database of Raising Intelligence. Perspectives on Psychological Science. Published online ahead of print. doi: 10.1177/1745691612462585.Accessed at http://pps.sagepub.com/content/8/1/25.full