Wechsler Individual Achievement Test-III (WIAT-III)
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Supplemental : Congenital Muscular Dystrophy (CMD).
|Short Description of Instrument||
The Wechsler Individual Achievement Test–III (WIAT-III) is a standardized academic achievement test used to measure previously learned knowledge in the areas of Reading, Written Language, Mathematics, and Oral Language. The scores are based on age norms. A description of each test, scores reported in Standard Scores (SS) and Percentile Rank (PR), and observations made by the examiner during testing are reported below.
SS PR Classification
131-above 98 very superior
121-130 92-97 superior
111-120 76-91 high average
90-110 25-75 Average
80-89 9-24 low average
70-79 3-8 Low
69-below 0.1-2 very low
Sub-tests and Observations:
The WIAT – III includes the following sub-tests and observations:
The WIAT is commonly used in clinical psycho-educational and neuropsychological evaluations and in research across populations.
Administration: Paper-and-pencil or on-line, individual, face-to-face
Ages: 4;0-50;11 years
Time: Varies by age/grade and number of subtests administered
Standardization: standardized on 3,000 students and adults; a portion of sample standardized on both Wechsler IQ tests and WIAT
Scoring: Hand, Computer Software, On-line (Q-Global)
A combination report of the Wechsler IQ and WIAT test results can be generated.
Thomas G. Burns. "Wechsler Individual Achievement Test-III: What is the 'Gold Standard' for Measuring Academic Achievement?" Applied Neuropsychology. Volume 17, Issue 3, 2010.
Document last updated July 2018