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Mainstream Science on Intelligence
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Intelligence is a very general mental capability that, among other things, involves the ability to reason, plan, solve problems, think abstractly, comprehend complex ideas, learn quickly and learn from experience.
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Intelligence, so defined, can be measured, and intelligence tests measure it well.
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They do not measure creativity, character personality, or other important differences among individuals, nor are they intended to.
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they all measure the same intelligence
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Most people cluster around the average (IQ 100)
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Intelligence tests are not culturally biased
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The brain processes underlying intelligence are still little understood
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Members of all racial-ethnic groups can be found at every IQ level
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The bell curve for whites is centered roughly around IQ 100; the bell curve for American blacks roughly around 85; and those for different subgroups of Hispanics roughly midway between those for whites and blacks. The evidence is less definitive for exactly where above IQ 100 the bell curves for Jews and Asians are centered.
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IQ is strongly related, probably more so than any other single measurable human trait, to many important educational, occupational, economic, and social outcomes
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A high IQ is an advantage in life because virtually all activities require some reasoning and decision-making
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Members of the same family also tend to differ substantially in intelligence (by an average of about 12 IQ points) for both genetic and environmental reasons
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IQs do gradually stabilize during childhood
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Differences in intelligence certainly are not the only factor affecting performance in education, training, and highly complex jobs
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There is no persuasive evidence that the IQ bell curves for different racial-ethnic groups are converging
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There is no definitive answer to why IQ bell curves differ across racial-ethnic groups
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Racial-ethnic differences are somewhat smaller but still substantial for individuals from the same socioeconomic backgrounds. To illustrate, black students from prosperous families tend to score higher in IQ than blacks from poor families, but they score no higher, on average, than whites from poor families
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