Overview
The Wechsler Individual Achievement Test – Third Edition (WIAT-III; Wechsler, 2009) is an individually-administered, norm-referenced test for comprehensively assessing the achievement of children, adolescents, college students, and adults ages 4 through 50 years, 11 months. The WIAT-III retained the basic content domains of the WIAT-II (i.e., listening, speaking, reading, writing, and mathematics), but made improvements to make administration easier and shorten the administration time. Another goal of the revision was to increase consistency with the Individuals with Disabilities Education Improvement Act of 2004 (IDEA). The WIAT-III can be used to comprehensively assess a broad range of academic skills or to test only in the area of need. Field research with the fourth edition is underway between October 2018 and November 2019.
Summary
Age: 4 years 0 months to 50 years 11 months
Time to Administer: 35-104 minutes
Method of Administration: Individually administered, norm-referenced measure of academic achievement across multiple areas. . Subtests may be given individually. Includes error analysis with scoring. Can be administered via paper-and-pencil or online using the Q-interactive platform.
Yields standard scores (M = 100, SD = 15), percentile ranks, age/grade equivalents, percentile ranks, stanines, and NCEs. Fall, winter, and spring grade-based standard scores.
Manual and Q-global web-based scoring available.
Subscales: Composite Scores: Oral Language, Total Reading, Basic Reading, Reading Comprehension and Fluency, Written Expression, Mathematics, Math Fluency
Subtests: Listening Comprehension, Oral Expression, Word Reading Pseudoword Decoding, Reading Comprehension, Oral Reading Fluency, Alphabet Writing Fluency, Spelling, Sentence Completion, Essay Composition, Math Problem Solving, Numerical Operations, Math Fluency – Addition, Math Fluency – Subtraction, Math Fluency – Multiplication
Autism Related Research
None found.