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The categories of IQ vary between IQ test publishers as the category labels for IQ score ranges are specific to each brand of test. The test publishers do not have a uniform practice of labeling IQ score ranges, nor do they have a consistent practice of dividing up IQ score ranges into categories of the same size or with the same boundary ...
Coding (primary, FSIQ) – children under 8 mark rows of shapes with different lines according to a code, children over 8 transcribe a digit-symbol code using a key. The task is time-limited. Symbol Search (primary) – children are given rows of symbols and target symbols, and asked to mark whether or not the target symbols appear in each row.
The reliability coefficients for the WPPSI-III US composite scales range from .89 to .95. The UK sample for the WPPSI-III was collected between 2002–2003 and contained 805 children in an attempt to accurately represent the most current UK population of children aged 2 years 6 months to 7 years 3 months according to the 2001 UK census data.
Leiter International Performance Scale or simply Leiter scale is an intelligence test in the form of a strict performance scale. It was designed for children and adolescents ages 2 to 18, [1] although it can yield an intelligence quotient and a measure of logical ability for all ages.
The test is currently in its second edition, published in 2015. [2]Both editions are suitable for evaluation of intellectual giftedness, [3] and high scores are accepted as qualifying evidence for high IQ societies such as Intertel (min. IQ ≥ 135) and American Mensa (min. IQ ≥ 130).
A U.S. government report expected to stir debate concluded that fluoride in drinking water at twice the recommended limit is linked with lower IQ in children. The report, based on an analysis of ...
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For children between the ages of 6 and 16, Wechsler Intelligence Scale for Children (WISC) is commonly used. The original WAIS (Form I) was published in February 1955 by David Wechsler , Chief Psychologist at Bellevue Hospital (1932–1967) in NYC, as a revision of the Wechsler–Bellevue Intelligence Scale released in 1939. [ 2 ]