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[–] VicariousJambi 0 points 3 points (+3|-0) ago 

Source: Table 2

https://www.semanticscholar.org/paper/The-Minnesota-transracial-adoption-study%3A-A-of-IQ-Weinberg-Scarr/a2d785edd7aa61b7ba51355053cc61d8b924fe35/figure/1

https://i.imgtc.ws/wnIxeyj.png - (The first IQ test was at age 7, the second was at 17. Children generally have better responses to the environmental factors of IQ at younger ages and then trend towards their parents IQ. Time #2 for black/black went down to 89)

They are also 3 1/2 times more likely to have behavioral problems.

https://www.academia.edu/20589418/The_Minnesota_Transracial_Adoption_Study