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Wechsler Adult Intelligence Scale – Fourth Edition (WAIS-IV)

The Wechsler Adult Intelligence Scale – Fourth Edition (WAIS-IV; Wechsler, 2008) is an individually administered, standardized test designed to measure cognitive ability in individuals from age 16 years to 90 years, 11 months.

Overview

It is the most frequently used measure of intelligence for adults and older adolescents. The WAIS-IV yields Full Scale IQ, Index Scores, and subtest-level scaled scores. The four Index Scores are Verbal Comprehension (VC), Perceptual Reasoning (PR), Working Memory (WM), and Processing Speed (PS). The WAIS-IV includes 10 core subtests and five supplemental subtests. The WAIS-IV may be scored manually or by using software.

Summary

Author (yr) Age Range (yrs) Method of Administration/Format Approx. Time to Administer Subscales
Wechsler Adult Intelligence Scale – Fourth Edition (WAIS-IV) Wechsler (2008] 16-91

Individually administered, norm-referenced intellectual measure; 15 subtests: 10 core and 5 optional

Yields four composite scores: Verbal Comprehension, Perceptual Reasoning, Working Memory, Processing Speed, and a Full Scale IQ.

60-90 min.

Verbal Comprehension (Similarities Vocabulary, Information, [Comprehension]); Perceptual Reasoning (Block Design, Matrix Reasoning, Visual Puzzles, [Figure Weights, Picture Completion]); Working Memory (Digit Span, Arithmetic, [Letter- Number Sequencing]); Processing Speed (Symbol Search, Coding, [Cancellation]); Full Scale

Availability: Pearson Assessment http://bit.ly/1h9wzXM

Research

Author (yr) Sample Size Topic(s) Addressed Outcome
Weiss, Keith, Zhu, & Chen (2013) 1,800 adults and 411 clinical adults - Age Range: Adults from normative sample Confirmatory factor analyses of normative sample

**The purposes of this research was to determine the constructs measured by the test and the consistency of measurement across large normative and clinical samples. Competing higher-order WAIS-IV four- and five-factor models were analyzed. When all 15 WAIS-IV subtests were considered, both four- and five-factor models were suitable, but the five-factor model provided a better fit. The WAIS-IV PRI differentiated into two composites as follows: POI(Gv), consisting of Block Design, Visual Puzzles, and Picture Completion; and FRI(Gf), consisting of Matrix Reasoning, Arithmetic, and Figure Weights. The five-factor solution included Quantitative Reasoning (RQ), consisting of Arithmetic and Figure Weights, as a narrow ability subsumed under FRI(Gf). Arithmetic, Vocabulary, and Figure Weights subtests had the highest g loadings. Cancellation had the lowest g loading. The WAIS-IV generally demonstrated full factor invariance between clinical and nonclinical samples

**Information from abstract
Author (yr) Sample Size Topic(s) Addressed Outcome
Canivez, G., & Kush, J. (2013). N/A N/A

**Criticizes the Weiss article on WAIS-IV from a number of theoretical, methodological, and practical problems that significantly limit conclusions and recommendations for practitioner interpretations.

**Information from abstract

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