title: The estimation of psychological genetic differences between classes and races.
mesh_terms: D000483:Alleles; D000704:Analysis of Variance; D003433:Crosses, Genetic; D004777:Environment; D005787:Gene Frequency; D005828:Genetics, Population; D005838:Genotype; D006801:Humans; D007360:Intelligence; D001523:Mental Disorders / Q000453:epidemiology; D010641:Phenotype; D044469:Racial Groups; D012923:Social Class; D013223:Statistics as Topic