Wechsler Individual Achievement Analysis

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Evaluating the Wechsler Individual Achievement Test - 3rd Edition Chelsea Hargrove Fort Hays State University TESP 350 Assessments in Education The Wechsler Individual Achievement Test - 3rd Edition (WIAT-III) was published by NCS Pearson in 2009. It was first created in 1992 by David Wechsler. The WIAT-III is a revision and update from the Wechsler Individual Achievement Test - 2nd Edition (WIAT II), which was published by Pearson in 2005. The WIAT-III is designed to measure the academic achievements of students in Pre-K through 12 grade, or ages 4 through 19. The results of WIAT-III are used to: identify academic strengths and weaknesses of the student, inform decisions regarding eligibility for educational services, educational placement, or diagnosis of a specific learning disability, and design instructional…show more content…
They use age-based reliability coefficients ranging from good (0.83 to 0.89), to excellent (0.90-0.97). For the timed tests within the WIAT III, stability coefficients are used based on test-retest. These were obtained by administering the WIAT-III two times. They used intervals of time ranging from two to 32 days, averaging an interval of 13 days for students in grades Pre-K through 5th grade, and an interval of 14 days for students in 6th through 12th grade (Breaux, pg 35). Administers use reliabilities of 0.90 or higher for making educational decisions within the subtests of Math Problem Solving, Word Reading, Pseudoword Decoding, Numerical Operations, Oral Reading Fluency, Oral Reading Rate, and Spelling. Administers use subtest scores with reliabilities between 0.80 and 0.90 for the subtests of Listening Comprehension, Early Reading Skills, Reading Comprehension, Sentence Composition, Essay Composition, Essay Composition: Grammar and Mechanics, Oral Expression, Oral Reading Accuracy, and the Math
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