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The highest score obtainable by direct look-up from the standard scoring tables (based on norms from the 1930s) was IQ 171 at various chronological ages from three years six months (with a test raw score "mental age" of six years and two months) up to age six years and three months (with a test raw score "mental age" of ten years and three ...
The Cognitive Abilities Test Fourth Edition (CAT4) is an alternative set of cognitive tests used by many schools in the UK, Ireland, and internationally. [7] The tests were created by GL Education [8] to assess cognitive abilities and predict the future performance of a student. It consists of eight subtests: figure classification; figure ...
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.
The Woodcock–Johnson Tests of Cognitive Abilities is a set of intelligence tests first developed in 1977 by Richard Woodcock and Mary E. Bonner Johnson (although Johnson's contribution is disputed). [1] It was revised in 1989, again in 2001, and most recently in 2014; this last version is commonly referred to as the WJ IV. [2]
Evaluation of WTAR scores across the degree of sustained TBI (mild, moderate, severe) suggests that the assessment may underestimate premorbid IQ in patients with more severe damage. [6] In patients with Alzheimer's disease, WTAR scores declined as the degree of cognitive impairment increased in more affected individuals.
In short, while diagnosis of any childhood or adult difficulty should never be made based on IQ alone (or interview, physician examination, parent report, other test etc. for that matter) the cognitive ability test can help rule out, in conjunction with other tests and sources of information, other explanations for problems, uncover co-morbid ...
The test takes 45–90 minutes to administer depending on the age of the participant. The mean score for the WIAT-II is 100 with a standard deviation of 15, and the scores on the test may range from 40 to 160. 68% of participants in the UK standardisation sample obtained scores of 85-115 and 95% obtained scores of 70-130.
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). [4] [5]