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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 ...
These include changes in the picture items, replacing of Americanisms and simple spelling differences. The WIAT-III US edition was published in 2009 for use with those aged 4 till 50 years and 11 months. It includes 16 subtests which is divided into Oral Reading, Math Fluency and Early Reading Skills.
Children in the 2 years 6 months – 3 years 11 months age band are administered only five of the subtests: Receptive Vocabulary, Block Design, Information, Object Assembly, and Picture Naming. Quotient and Composite scores have a mean of 100 and a standard deviation of 15. Subtest scaled scores have a mean of 10 and a standard deviation of 3.
The current version of the test, the WAIS-IV, which was released in 2008, is composed of 10 core subtests and five supplemental subtests, with the 10 core subtests yielding scaled scores that sum to derive the Full Scale IQ. With the WAIS-IV, the verbal/performance IQ scores from previous versions were removed and replaced by the index scores.
A block design test is a subtest on many IQ test batteries used as part of assessment of human intelligence. It is thought to tap spatial visualization ability and motor skill. The test-taker uses hand movements to rearrange blocks that have various color patterns on different sides to match a pattern.
Explanation of subtests is wrong. POI should be Perceptual Reasoning instead of organization for WISC IV. object assembly etc need to be changed to reflect 2003 changes. As it stands this is pretty out of date —Preceding unsigned comment added by 139.102.45.171 02:19, 4 October 2009 (UTC)
IQ scores can differ to some degree for the same person on different IQ tests, so a person does not always belong to the same IQ score range each time the person is tested (IQ score table data and pupil pseudonyms adapted from description of KABC-II norming study cited in Kaufman 2009).
The test serves as a supplementary subtest of the Wechsler intelligence scales. [3] The test is suitable for ages 3 and up. The original version was developed by Porteus when he was head teacher of the Victorian Education Department's first special school in Melbourne, Australia.