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This investigation assessed the ability of the Wechsler Adult Intelligence Scale-Third Edition (WAIS-III) short forms to estimate both index and IQ scores in a large, mixed clinical sample (N = 809). More specifically, a commonly used modification of Ward's seven-subtest short form (SF7-A), a recently proposed index-based SF7-C and eight-subtest short form (SF8) were evaluated. All three SFs proved adequate for estimating verbal comprehension, perceptual organization, and full-scale intelligence within considerably less time relative to an SF11 that provides full measurement of WAIS index scores. The SF7-A provided the best combination overall in terms of psychometric performance and estimated time savings. However, SF8 best represents all four factors and allows measurement of processing speed. The SF7-C was most hampered by inclusion of the Block Design subtest in the current assessment, but may prove advantageous in future extensions to the WAIS-IV. (Contains 2 tables.)

Full scale IQ (FSIQ) scores, followed by verbal (VIQ) and performance (PIQ) IQ scores, demonstrated the highest comparability between WAIS-R and its seven subtest form when tested with 1,880 subjects from the standardization sample. Correlations between versions were consistently lower for PIQ than FSIQ and VIQ. Age grouping did not affect alternative forms reliability. (Author/MAK)

The nature and magnitude of practice effects on the Wechsler Memory Scale-Revised (D. Wechsler, 1987) were studied with 64 adult college students. The clinically meaningful increase observed across the four test sessions highlights the importance of controlling for practice effects on repeated administration of neuropsychological measures. (SLD)

Seven different short forms of the Wechsler Adult Intelligence Scale, Revised (WAIS-R) were compared in a mixed clinical sample of 306 adults to evaluate short form predictions of the full scale IQ. The seven-test short form of C. Ward (1990) was the best predictor across ranges of intellectual functioning, supporting its use when time is limited. (SLD)

The full version of the Wisconsin Card Sorting Test (WCST) (S. Heaton and others, 1993) was compared to a 64-card version (WCST-64) using normative data and results from 350 neuropsychological patients. The WCST-64 was found useful only for respondents obtaining five or more categories by the end of the first deck. (SLD)

This study investigated the best estimate of true Wechsler Adult Intelligence Scale-Revised (WAIS-R) Full Scale IQ for people who recently had been administered the WAIS-R using 65 college students. Results indicate the Verbal IQ, Verbal Comprehension factor score, and subtracting six points from the current full scale IQ yield the best estimates. (SLD)

Eighty-seven normal older people were administered the Wisconsin Sorting Test on two occasions averaging over a year apart. There were average retest gains of 5 to 7 standard score points. The standard error of prediction, standard error of difference, and abnormal test-retest discrepancy scores were calculated for clinical use. (SLD)

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 tradeoff occurs between the predictive power and the reliability of a short form. Keywords: Wechsler Adult Intelligence Scale-III; short forms; intelligence testing; assessment