Abstract
Authors of this chapter describe the Wechsler Nonverbal Scale of Ability (WNV; Wechsler and Naglieri in Wechsler nonverbal scale of ability. Pearson, San Antonio, 2006). It is an individual nonverbal assessment of general cognitive ability for ages 4 years and 0 months to 21 years and 11 months (4:0–21:11). The WNV was adapted from earlier versions of the Wechsler scales to minimize or eliminate nonverbal instructions and demands, while keeping the format of subtest and composite scores. In particular, authors describe the theory underlying the WNV, administration and scoring, and strengths and limitations of the test. The test assesses Nonverbal IQ in a robust, yet relatively quick and easy-to-administer format. The inclusion of pictorial directions is unique and makes the test an option if English proficiency of the examinee is a concern. The test materials are well put together, colorful, and engaging. The WNV Administration and Scoring Manual and Technical and Interpretative Manual include ample information about the technical properties of the test, test development, step-by-step administration, and interpretation strategies. Although the literature contains reviews that mention both strengths and weaknesses, the test is generally characterized as psychometrically strong; it appears to offer advantages over highly verbally laden measures for assessing students who may be disadvantaged by language loaded instruments.
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Jaquett, C.M., Kirkpatrick, B.A. (2017). Wechsler Nonverbal Scale of Ability. In: McCallum, R. (eds) Handbook of Nonverbal Assessment. Springer, Cham. https://doi.org/10.1007/978-3-319-50604-3_9
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