Test Review: Wechsler Individual Achievement Test, Fourth Edition (WIAT-4)

Abstract

This article reviews the administrative, scoring, and psychometric properties of the Wechsler Individual Achievement Test, Fourth Edition (WIAT-4, NCS Pearson, 2020 ). The WIAT-4 is one of the more commonly administered broadband measures of academic achievement. The instrument was determined to be well-conceptualized, and generally psychometrically sound. Omissions include factor analyses to determine the instrument’s theoretical and scoring structure, and the lack of presentation of item analysis results. Importantly, the Essay Composition subtest is now much easier to score which should serve to increase interest in the WIAT-4 as a viable option for the assessment of academic achievement. Although there are a number of subtests beyond the core battery to administer, users may find that the time and effort required to administer those subtests are worth the effort given the rich detail furnished that is linked to scientific literature regarding the etiology of learning disabilities.