Race and IQ : Mental Retardation

Mental retardation or mental disability, is a generalized disorder characterized by impaired cognitive functioning. The affected individuals with mental retardation have an IQ below 70 (between 50 and 70 = mild mental retardation; Below 50 = moderate mental retardation).

The races differ in IQ (70 to Sub-Saharan Africans, 85 African Americans, 100 whites) but also in the prevalence of mental retardation, after correcting for socio-economic status. This is what Yeargin-Allsopp et al. (1995, pp. 326-327) have found : the prevalence of mild mental retardation was twice as high among black Americans, controlling for SES.

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Independently of income, intelligent people tend to be more libertarian

The NLSY97 contains questionnaires that allows us to create a libertarianism index. The questionnaires, listed below with the SPSS syntax used, having 4 values where, 1= Definitely should be, 2= Probably should be, 3= Probably should not be, 4= Definitely should not be, asked whether or not the government should keep the prices under control, reduce income inequality, provide jobs for everyone, and so on.

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