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The test most similar to the WRAT is the Peabody Individual Achievement Test (PIAT), another short, individually administered test which covers comparable material. In general the WRAT correlates very highly with the PIAT. The WRAT correlates moderately with various IQ tests, in the range of .40 to .70 for most groups and most tests.
Psychometric legend has it that a 1–9 scale was used because of the compactness of recording the score as a single digit but Thorndike [1] claims that by reducing scores to just nine values, stanines "reduce the tendency to try to interpret small score differences (p. 131)". The earliest known use of stanines was by the U.S. Army Air Forces ...
National Assessment of Educational Progress (NAEP); State achievement tests are standardized tests.These may be required in American public schools for the schools to receive federal funding, according to the US Public Law 107-110 originally passed as Elementary and Secondary Education Act of 1965, and currently authorized as Every Student Succeeds Act in 2015.
The WRAT, which was developed in coalition with the WRIT, is often criticized for its technical limitations, unreliability, and strong potential for bias. The WRAT and the WRIT are often used together to identify learning disabilities among children. The identification system involving both these tests is thus considered questionable.
The PIAT-R/NU test is accompanied by a manual which provides grade and age equivalent scores. The modern version also comes with a software program called PIAT-R ASSIST which processes the raw scores and produces various reports, including age and grade equivalents, standard scores by age and grade, percentile ranks, and derived scores for ...
A scaled score is the result of some transformation(s) applied to the raw score, such as in relative grading. The purpose of scaled scores is to report scores for all examinees on a consistent scale. Suppose that a test has two forms, and one is more difficult than the other. It has been determined by equating that a score of 65% on form 1 is ...
The formula for calculating the raw score of the Dale–Chall readability score (1948) is given below: + ()If the percentage of difficult words is above 5%, then add 3.6365 to the raw score to get the adjusted score, otherwise the adjusted score is equal to the raw score.
Race-norming, more formally called within-group score conversion and score adjustment strategy, is the practice of adjusting test scores to account for the race or ethnicity of the test-taker. [1] In the United States, it was first implemented by the Federal Government in 1981 with little publicity, [ 2 ] and was subsequently outlawed by the ...