Comparison of two computational formulas for a WAIS-R seven subtest short form

Myers, Bill; Adams, Russell L.

doi:10.1002/(sici)1097-4679(199708)53:5<465::aid-jclp8>3.0.co;2-m

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…Similar to previous findings (Iverson et al, 1997), there was no significant difference between summary scores derived from deviation quotients versus prorating. Internal consistency, alternate-forms reliability, comparisons of mean performance, and percentage of cases that fell within 5 or 10 points of the full WAIS-3 score all pointed to the same finding.…”

Section: Discussionsupporting

confidence: 88%

“…In a sample of patients with lateralized or diffuse lesions, the VIQ minus PIQ difference scores with the short form fell within 5 points of that of the full WAIS-R for 75% of the sample (Ryan, Abraham, Axelrod, & Paolo, 1996). Interestingly, the seven subtests included in this estimate of full WAIS-R performance were as equally effective when scaled scores were weighted differently as when they were given equal weights in prorating the sum of scaled scores (Iverson, Myers, & Adams, 1997).…”

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confidence: 83%

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Evaluation of seven-subtest short forms of the Wechsler Adult Intelligence Scale-III in a referred sample

Axelrod

Ryan²,

Ward³

2001

Archives of Clinical Neuropsychology

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The application of seven-subtest short forms of the Wechsler Adult Intelligence Scale-III (WAIS-3) was evaluated in a sample of 281 mixed clinical patients from three Veterans Affairs Medical Centers. Short-form summary scores were derived from deviation quotient tables and from prorating. They included either Block Design or Matrix Reasoning. Short-form summary scores for Full-Scale IQ (FSIQ) and Verbal IQ (VIQ) demonstrated good alternate-forms reliability with the full WAIS-3 scores, whereas Performance IQ (PIQ) summary scores were less accurate. Short forms derived from deviation quotients and prorating did not differ from each other. However, the inclusion of Matrix Reasoning resulted in somewhat better accuracy with WAIS-3 PIQ than did Block Design. The results of this study support the use of the seven-subtest short form of the WAIS-3 in estimating full WAIS-3 summary scores, especially for FSIQ and VIQ.

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Section: Discussionsupporting

confidence: 88%

mentioning

confidence: 83%

Evaluation of seven-subtest short forms of the Wechsler Adult Intelligence Scale-III in a referred sample

Axelrod

Ryan²,

Ward³

2001

Archives of Clinical Neuropsychology

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Comparison of seven‐subtest and Satz‐Mogel short forms of the WAIS‐III

Kulas

Axelrod

2002

J Clin Psychol

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Intellectual functioning remains an important domain of functioning to be measured. To reduce the lengthy administration time, numerous short forms of the WAIS-III have been devised. The present study aimed to compare two methods of applying short forms of the WAIS-III within a clinical population. The results revealed that both item-reduced and selected subtest short forms provide excellent predictions of full administration WAIS-III summary and index scores. The Satz-Mogel short form appeared to provide higher predictive power than the seven-subtest short forms and accounted for a higher number of cases within 6 points of the obtained scores from the full administration. However, the Satz-Mogel short form was inferior to the seven-subtest short forms in terms of the reliability of the index and summary IQ scores. As found in previous research, a trade-off occurs between the predictive power and the reliability of a short form.

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