Item-reduction vs. subtest-reduction short forms on the WAIS-R with phychiatric inpatients

Abstract

The relative performance of two Wechsler Adult Intelligence Scale‐Revised (WAIS‐R) short forms, the Satz‐Mogel item reduction technique (Adams, Smigielski, & Jenkins, 1984; Satz & Mogel, 1962) and the Silverstein (1982) subtest‐reduction technique, was examined for a group of psychiatric inpatients (N = 75). The two short forms were evaluated on several criteria, including their ability to predict the Full Scale IQ (FSIQ) using regression analysis, their reliability, and their total administration time. The standard error of estimates obtained in predicting the FSIQ were comparable for both short forms and resulted in a ± 7 confidence interval to achieve 90% accuracy.

Evaluation of Kaufman's short forms of the WAIS-R with psychiatric inpatients

“…A series of studies has led to this conclusion. Using evaluative criteria identical to those used in this study, I have argued previously against the use of two item-reduction short forms of the WAIS-R (Boone, 1991a(Boone, , 1991b: the Satz-Mogel (1966;Adams et al, 1984) split-half approach and the Modified WAIS-R (Cella, 1984). Before the Kaufman (1990; Kaufman & Ishikuma, 1989) short forms were developed, I argued that the Silverstein (1982) tetrad was superior to the Silverstein (1982) dyad and triad, the Reynolds et al (1983) tetrad, and the Brooker and Cyr (1986) dyad, triad, and tetrad.…”

“…Short forms of the Wechsler Adult Intelligence Scale-Revised (WAIS-R; Wechsler , 1981) continue to be used routinely by clinicians and remain the preferred method of obtaining a brief measure of a psychiatric inpatient's global intellectual functioning (Boone, 1990(Boone, , 1991a(Boone, , 1991b. Several authors (Boone, 1991;Kaufman, 1990;Sattler, 1988;Silverstein, 1990a;Watkins, 1986) have encouraged the use of a WAIS-R subtestreduction short form (e.g., Brooker & Cyr, 1986;Reynolds, Willson, & Clark, 1983;Silverstein, 1982Silverstein, , 1990b rather than an item-reduction short form (e.g., Adams, Smigielski, & Jenkins, 1984;Cella, 1984), based on psychometric as well as clinical reasons.…”

In search of a measure of intellectual functioning for an inpatient psychiatric population with low cognitive ability.

“…The literature seems generally supportive of the use of short forms of the Wechsler Scales (Brooker & Cyr, 1986; Cella, 1984; Clayton, Sapp, O'Sullivan & Hall, 1986; Reynolds, Wilson & Clark, 1983; Ryan, Utley & Worthen, 1988; Sattler, 1988; Satz & Mogel, 1962; Silverstein, 1990; Watkins, 1986; Yudin, 1966) but contains a limited number of studies in which short forms of I.Q. tests are evaluated when employed with psychiatric inpatients (Boone, 1991; McCusker, 1994). When mean differences and classification accuracy between long and short forms of Wechslers are examined, the utilization of short forms with psychiatric inpatients has been questioned (Finch, Thornton & Montgomery, 1974).…”

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

“…Because all subtests are given, reduced-item procedures are meant to be used as a replacement for the full WAIS-R (Silverstein, 1990b). Although validity coefficients for the IQs are high (Silverstein, 1982b), reliability is lower than that of the selected-subtest short forms (Boone, 1991;Silverstein, 1990aSilverstein, , 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.…”