Validation of the Satz-Mogel short form for the WAIS-R with psychiatric inpatients.

Abstract

The present study evaluated the validity of the Satz-Mogel short form for the Wechsler Adult Intelligence Scale^Revised (WAIS-R) with psychiatric inpatients. Original WAIS-R protocol records of 64 psychotic, nonpsychotic, and organic inpatients were rescored to obtain short-form scale scores and IQs. Pearson productmoment correlations were found to be uniformly high (p < .001). The results suggest that the Satz-Mogel method has clinical utility and statistical validity with the WAIS-R, especially for determining global estimates of intellectual functioning. The typical administration time of a standard Wechsler Adult Intelligence Scale (WAIS; Wechsler, 1955) has been estimated to be in excess of 1 hour (Cronbach, 1960). Given the time restraints on many clinicians, many abbreviated forms of the have been developed. Previous findings suggest that 90% of all WAISs are administered in a shortened form (Holmes, Armstrong, Johnson, & Ries, 1966). Most short forms either combine various subtests that correlate highly with the Full Scale IQ score or reduce the number of items within subtests (Zimmerman & Woo-Sam, 1973). More recent attempts at abbreviation include the criterion-based modified WAIS technique (Vincent, 1979) and the decision theoretic approach (Robertson, Steinmeyer, & Goff, 1980) that draws its strength from multivariate statistical procedures. One of the most popular and enduring of the abbreviated forms is the Satz-Mogel method (Satz & Mogel, 1962; Silverstein, 1982). This method uses data from all 11 subtests and cuts administration time by approximately one half. Correlations between SatzMogel short form IQs and original IQs range from .97 to .99. The 25-year-old has recently been replaced by the Wechsler Adult Intelligence Scale-Revised (WAIS-R; Wechsler, 1981). The purpose of the present study was to determine the validity of the Satz-Mogel short form with the WAIS-R in a psychiatric inpatient setting.