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The Wechsler Adult Intelligence Scale (WAIS) is an Intelligence Quotient (IQ) test designed to measure intelligence and cognitive ability in adults and older adolescents. [1] For children between the ages of 6 and 16, Wechsler Intelligence Scale for Children (WISC) is commonly used.
An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. [1] Originally, IQ was a score obtained by dividing a person's mental age score, obtained by administering an intelligence test, by the person's chronological age, both expressed in terms of years and months.
IQ tests generally are reliable enough that most people 10 years of age and older have similar IQ scores throughout life. [14] Still, some individuals score very differently when taking the same test at different times or when taking more than one kind of IQ test at the same age. [ 15 ]
The revised edition of the Stanford–Binet over time has devised substantial changes in the way the tests are presented. The test has improved when looking at the introduction of a more parallel form and more demonstrative standards. For one, a non-verbal IQ component is included in the tests whereas in the past, there was only a verbal component.
The resulting IQ standard score is the subject of much investigation as psychologists check correlations between IQ and other life outcomes. The Wechsler IQ tests for adults and for children have long been regarded as the "gold standard" in IQ testing. [1] fMRI data showing regions of activation
Most IQ tests are designed to yield a mean score of 100 with a standard deviation of 15; the 98th-percentile score under these conditions is 130.8, assuming a normal distribution. [14] However, American Mensa does not provide a score comparable to scores on other tests; the test serves only to qualify a person for membership. [15]
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