Almost imperceptible declines in performance and verbal measures, but steep declines in analytics and mathematics is characteristic of the classic aging pattern using the WAIS.
The WAIS-IV includes full-scale IQ and indices of four factors: verbal comprehension, perceptual reasoning, working memory, and processing speed. The Wechsler IQ test is probably designed to test adults and children because this type of test focuses more on adults to measure adult intelligence and ability, and it also focuses on older youth.
The Wechsler Adult Intelligence Scale (WAIS) intelligence quotient (IQ) tests are the primary clinical instruments used to measure intelligence in adults and adolescents. The original WAIS (Form I) was published in February 1955 by David Wechsler as a version of the Wechsler-Bellevue Intelligence Scale.
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