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A Perceptual Reasoning Index (PRI) can be derived from the raw scores on the Matrix Reasoning and Block Design subtests. A Full Scale IQ-2 (FSIQ-2) can be derived from the raw scores on the Matrix Reasoning and Vocabulary subtests, while a Full Scale IQ-4 (FSIQ-4) can be derived from the raw scores on all 4 subtests. WASI-II Subtests grouped by ...
The first Wechsler test published was the Wechsler–Bellevue Scale in 1939. [33] The Wechsler IQ tests for children and for adults are the most frequently used individual IQ tests in the English-speaking world [34] and in their translated versions are perhaps the most widely used IQ tests worldwide. [35]
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The original WISC (Wechsler, 1949), developed by the Romanian-American psychologist David Wechsler, Ph.D., was an adaptation of several of the subtests that made up the Wechsler–Bellevue Intelligence Scale (Wechsler, 1939), but also featured several subtests designed specifically for it. The subtests were organized into Verbal and Performance ...
Patients recovering from traumatic brain injury (on average measuring in severely impaired ranged on the Glasgow Coma Scale) showed high stability in WTAR scores during their recovery period while performing highly similar to demographic estimates, suggesting the test is a reliable estimate of premorbid intelligence in individuals with TBI. [3]
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.
Figure from The Block-Design tests by Kohs (1920) showing, in grayscale, an example of his block test. [1]David Wechsler adapted a block design subtest for his Wechsler-Bellevue test, the predecessor of his WAIS (Wechsler Adult Intelligence Scale), from the Kohs block design test developed in 1920 at Stanford University by Samuel Calmin Kohs.
Despite the doubt surrounding shorter IQ tests, the WRIT and many similar tests—including the Wechsler Abbreviated Scale of Intelligence (WASI)—have a high correlation with full-length IQ test results. [5] The WRIT is widely used for screening purposes, especially in preschool- and school-aged children. [4]
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