Minnesota Transracial Adoption Study shows black adoptees match ordinary black IQs while mulattoes score higher but below whites. Moore study finds blacks and mulattoes gain 10-16 IQ points from white adoptive parents. Owen's South Africa data places coloreds intermediate between blacks and whites on Progressive Matrices. Gaps widen on harder test items, proving racial differences intensify with cognitive demand. Rowe's Add Health analysis shows mixed black-white students intermediate on PVT scores. Tizard's Caribbean orphanage kids have blacks and mulattoes above whites at age 4 but sample too selected for conclusions. Fernandez's Brazil study ranks Asians > whites > browns > blacks at age 10. Eyferth study of German-black GI offspring yields 96.5 IQ close to hereditarian prediction of 95.6 after soldier selection adjustments. Rushton's university students show coloreds intermediate despite admission IQ compression. Udry's Add Health data confirms white-Asian hybrids intermediate on PVT and GPA despite parental trait reversals. NAEP 2011 scores place black-white mixes intermediate between blacks and whites. Scarr admits Minnesota data supports genetic hypothesis over environmental. Nisbett ignores Moore flaws and hereditarian analyses. Black soldiers' IQ truncated to 90-92 median due to 30% exclusion. Coloreds consistently intermediate in multiple South African samples. Intermediate scores complicate environmental explanations requiring precise hardship gradients. Genetic model simply predicts averages from parental mixtures. White-Asian hybrids intermediate on crossed traits like PVT and GPA, ruling out culture. Eyferth whites score low due to mothers but still aligns with genetics. Mulattoes in adoptions show age-7 boosts fading per heritability rise.