ERIC Number: EJ878549
Record Type: Journal
Publication Date: 2010-Mar
Abstractor: As Provided
Reference Count: 37
Independent Examination of the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV): What Does the WAIS-IV Measure?
Benson, Nicholas; Hulac, David M.; Kranzler, John H.
Psychological Assessment, v22 n1 p121-130 Mar 2010
Published empirical evidence for the Wechsler Adult Intelligence Scale--Fourth Edition (WAIS-IV) does not address some essential questions pertaining to the applied practice of intellectual assessment. In this study, the structure and cross-age invariance of the latest WAIS-IV revision were examined to (a) elucidate the nature of the constructs measured and (b) determine whether the same constructs are measured across ages. Results suggest that a Cattell-Horn-Carroll (CHC)-inspired structure provides a better description of test performance than the published scoring structure does. Broad CHC abilities measured by the WAIS-IV include crystallized ability (Gc), fluid reasoning (Gf), visual processing (Gv), short-term memory (Gsm), and processing speed (Gs), although some of these abilities are measured more comprehensively than are others. Additionally, the WAIS-IV provides a measure of quantitative reasoning (QR). Results also suggest a lack of cross-age invariance resulting from age-related differences in factor loadings. Formulas for calculating CHC indexes and suggestions for interpretation are provided. (Contains 5 tables and 3 figures.)
Descriptors: Intelligence, Intelligence Tests, Measures (Individuals), Short Term Memory, Cognitive Processes, Visual Stimuli, Age Differences, Test Results
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Wechsler Adult Intelligence Scale