Mixed-race IQ patterns refute claims of inherited racial intelligence differences.
Evidence
These claims have been decisively answered by, among others, biologist Steven Jay Gould in the second edition of The Mismeasure of Man (1996). Among the many pieces of evidence against racial IQ differences is the case of mixed-race people. If there really were inherited racial IQ differences between people of African ancestry and people of Caucasian ancestry, then we would expect to find that mixed-race people would consistently have IQs in between, and that those scores would vary based on the percentage of “white” or “black” ancestry in one’s history—that is, the more African in your genes, the lower your score. But the reality is that there is no such variation. — Rebecca A. Martusewicz, Jeff Edmundson, and John Lupinacci, EcoJustice Education, 1288
Categorization
- XREF: The disconfirming prediction logic is a crisp, teachable decomposition of why the hereditarian inference fails. — connects to: Race has no genetic basis yet produces real material consequences. — Rebecca A. Martusewicz, Jeff Edmundson, and John Lupinacci, EcoJustice Education: Toward Diverse,…, 1112; Mixed-race children’s IQ tracks rearing environment, not racial genetics — Harriet A. Washington, A Terrible Thing to Waste, 119; Genetic differences within racial groups exceed differences between groups — Ibram X. Kendi, Stamped from the Beginning: The…, 1179 (+3 more)
Broader Connections
- Mixed-race children’s IQ tracks rearing environment, not racial genetics
#corroborates(0.92) — Harriet A. Washington, A Terrible Thing to Waste, 119 - Genetic differences within racial groups exceed differences between groups
#corroborates(0.82) — Ibram X. Kendi, Stamped from the Beginning, 1179 - Postwar IQ testing data grouped immigrant whites into inferior racial ranks
#complicates(0.75) — John Higham, Strangers in the Land, 1664 - Twin studies attribute about seventy percent of intelligence variance to genetics
#complicates(0.70) — Bob Altemeyer, The Authoritarian Specter, 886