Replying to @ad_captandum
have you dug into the meta study they cite for 12-18 iq gain of adopted siblings? seems suspect, but ive not read it https://www.researchgate.net/publication/289963618_Adoption_and_Cognitive_Development_A_Meta-Analytic_Comparison_of_Adopted_and_Nonadopted_Children%27s_IQ_and_School_Performance …
10:06 AM - 18 May 2017
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