Adopted Kids' Average IQ Higher Than Non-Adopted Siblings

March 23, 2015 8:00 PM

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MONDAY, March 23, 2015 (HealthDay News) -- Adopted children tend to have a slightly higher IQ than siblings who remained with their biological parents, a recent study found.

The difference between siblings -- equivalent to about four IQ points -- appears to stem from higher average educational levels in adoptive parents, according to the researchers.

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