1. Genetics And Intelligence
... IQ scores will rise. Herrnstein and Murray also contend that between 40 and 80 percent of cognitive ability is genetic, and therefore heritable. They say that means that African-Americans score lower on IQ tests, on average, and that they are born that way. They claim efforts to improve cognitive ability through better education or living conditions will have limited returns ... definition of intelligence. Even Psychometricians, who study and measure intelligence, do not agree on the "correct" definition. One definition could be "the ability to reason, learn quickly, analyze and solve ne...
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