I find existing transracial adoption studies almost useless. Not enough info about both biological parents, prenatal conditions, and biological parents' environments. Someone should improve on the current work.
Jensen in 1973 on the need for a trans-racial adoption study. http://arthurjensen.net/wp-content/uploads/2014/06/1973-jensen-4.pdf …pic.twitter.com/u0hEdleuc6
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Lots of data exist actually, but no one dares go looking, afraid what they might find.
End of conversation
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