Efficacy of the Satz-Mogel short form WAIS—R for tumor patients with lateralized lesions.

Abstract

The ability of the Satz and Mogel (1962) short form WAIS-R to provide equivalent information about IQ scores and age-corrected scale scores was examined as a function of side of lesion for 34 left hemisphere damaged (LHD) and 29 right hemisphere damaged (RHD) patients having primary brain tumors. Correlations between the two forms were significant for all WAIS-R scores with the exception of the Object Assembly subtest for RHD patients. The short form significantly overestimated Verbal IQ, Performance IQ, Full Scale IQ, Similarities and Picture Arrangement subtest scores. It significantly underestimated Object Assembly subtest scores. A marked percentage of patients showed one or more category changes for most WAIS-R scores and two or more category changes for some of these scores. The distribution of discrepancies between scores and the number of category changes did not differ significantly for LHD and RHD patients.Short forms of the Wechsler Intelligence Scales have been developed by eliminating entire subtexts (Sirverstein, 1982) or by eliminating items within subtests (Pauker, 1963;Satz & Mogel, 1962;Vincent, 1979). Both types of changes are problematic in several ways. Although the following discussion will focus on problems associated with the Satz-Mogel short form (Satz & Mogel, 1962), the issues raised apply to other short forms as well.Although correlation coefficients relating the Satz-Mogel short form to full length Wechsler test IQ and subtest scaled scores tend to be relatively high (

WAIS—R abbreviated forms in the elderly: A comparison of the Satz-Mogel with a seven-subtest short form.

“…The current findings are consistent with previous research in that high validity coefficients are generally found for both selected-item (Boone, 1991; Mattis et al, 1992; Osato et al, 1989) and selected-subtest short forms (Boone, 1991; Benedict et al, 1992, Paolo & Ryan, 1991), and the categorization of intelligence according to the WAIS–R classification system is generally poor. However, the finding that the Satz-Mogel and seven-subtest short forms can detect significant VIQ–PIQ discrepancies about 75% of the time is new and need to be replicated.…”

“…Although validity coefficients for the IQs are high (Silverstein, 1982b), reliability is lower than that of the selected-subtest short forms (Boone, 1991; Silverstein, 1990a, 1990b). Mattis, Hannay, and Meyers (1992) evaluated the efficacy of the Satz-Mogel short form in a sample of tumor patients who had lateralized lesions. Although they reported adequate validity coefficients (.90 or greater for the three IQs), the Satz-Mogel IQ scores significantly overestimated those of the complete WAIS–R, and level of agreement concerning the classification of intelligence was relatively poor.…”

WAIS-R Factor Structure in Alzheimer's Disease Patients: A Comparison of Alternative Models and an Assessment of Their Generalizability.

“…All remaining studies used the method of rescoring, which poses some interpretive difficulties. Nonetheless, most rescoring comparability studies have found that scaled scores are less similar than are global indices (e.g., Full Scale IQ) between short and full versions of the WAIS-R (e.g., Mattis, Hannay, & Meyers, 1992), with incongruities observed most often for the performance subtests. Given these findings, our expansion of the Satz-Mogel WAIS-R, which includes full administration of the Block Design and Object Assembly subtests, was intended to minimize any discrepancies between scaled scores derived from our expanded Satz-Mogel WAIS-R and the full WAIS-R.…”

Neuropsychological asymmetry in Alzheimer's disease: Verbal versus visuoconstructional deficits across stages of dementia

“…As a result, z scores from either form were used for the verbal fluency measure, depending in which version of the test was administered. The Satz-Mogel short form procedure (Satz & Mogel, 1962) was used on the Comprehension and Vocabulary subtests of the WAIS-R, and all other WAIS-R subtests with the exception of the Block Design, Object Assembly, and Similarities subtests, which were administered in their entirety to increase the reliability of the Full Scale IQ (FSIQ) scores (Massad et al, 1988;Mattis et al, 1992). For the WAIS-R subtests, z scores derived from age-corrected scaled scores were used to control for the range of age in this sample.…”