From a scientific standpoint, it has been shown that intelligence tests are fully reliable and really measure what they say they measure and that it is possible to control for the effects of social class and cultural differences.

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While there is some evidence to suggest that intelligence tests can be reliable, it is still a subject of debate among psychologists. Additionally, controlling for the effects of social class and cultural differences is difficult and not always completely effective.

From a Scientific Standpoint, It Has Been Shown That Intelligence