IQ and Race

Race , Genes , and IQ

According to The Bell Curve (New York: Free Press, 1994), Black Americans are genetically inferior to Whites. That's not the only point in Richard Herrnstein and Charles Murray's book. They also argue that there is something called "general intelligence" which is measured by IQ tests, socially important, and 60 percent "heritable" within Whites. (I'll explain heritability below.) But my target ...

Explaining Race Differences in IQ

The claim that there are genetic racial differences in IQ has been based mainly on two grounds: the evidence for high within-race heritability for IQ and the failure of various environmental explanations to account completely for mean racial differences. However, neither of these has direct relevance to the question of whether race differences in IQ have mainly a genetic or mainly an environmen...

Race and Sex Differences in Head Size and IQ

An analysis of IQ in relation to head size (and by inference, brain size) was performed on some 14,000 children and their full siblings, almost evenly divided by race (white and black) and sex, on whom data were obtained at ages 4 and 7 years in the National Collaborative Perinatal Project. Within each race X sex group, IQ is significantly correlated with head size, age and body size having bee...

Race and IQ in the postgenomic age: The microcephaly case

A convergence of contextual factors, technological platforms and research frameworks in the genomics of the human brain and cognition has generated a new postgenomic model for the study of race and IQ. Centered on the case study of Bruce T. Lahn’s 2005 claims about the genomic basis of racial differences in brain size and IQ, this article maps the disciplinary terrain of this research, analyzes...

Race , Social Class , and IQ Sandra Scarr - Salapatek