![]() ![]() Clinical and neuropsychological assessment.The WAIS-IV SA can be used in the following areas: Processing Seed Index (PSI): Symbol Search(C), Coding(C), and Cancellation(S).Working Memory Index (WMI): Digit Span(C), Arithmetic(C), and Letter-Number Sequencing(S).Perceptual Reasoning Index (PRI): Block Design(C), Matrix Reasoning(C), Visual Puzzles(C), Picture Completion(S), and Figure Weights(S).Verbal Comprehensive Index (VCI): Similarities(C), Vocabulary(C), Information(C), and Comprehension(S).The WAIS-IV SA produces four index scores made up of the following subtests: The WAIS-IV SA is composed of 10 core (C) subtests and 5 supplemental (S) subtests, with the 10 core subtests comprising the Full Scale IQ. The WAIS-IV SA edition has been adapted to specifically suit the needs of the South African population. The WAIS-IV SA is a comprehensive measure of adult intelligence that can be used for a variety of psychological purposes from forming part of a selection battery to determine an individual’s ability to qualify for special services,to identification and treatment of psychological disability. ![]() PsycINFO Database Record (c) 2010 APA, all rights reserved.In recognition of emerging demographic and clinical trends internationally, the WAIS-IV SA was developed to provide clinicians with the most advanced measure of cognitive ability. ![]() Formulas for calculating CHC indexes and suggestions for interpretation are provided. Results also suggest a lack of cross-age invariance resulting from age-related differences in factor loadings. Additionally, the WAIS-IV provides a measure of quantitative reasoning (QR). 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. Results suggest that a Cattell-Horn-Carroll (CHC)-inspired structure provides a better description of test performance than the published scoring structure does. 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. 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. ![]()
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