Prediction of WAIS IQ's from the Shipley-Hartford, the Army General Classification Test and the Revised Beta Examination
✍ Scribed by Charles G. Watson; William G. Klett
- Publisher
- John Wiley and Sons
- Year
- 1968
- Tongue
- English
- Weight
- 329 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0021-9762
No coin nor oath required. For personal study only.
✦ Synopsis
PROBLEM
Time limitations usually prohibit the routine use of the Wechsler Adult Intelligence Scale (WAIS) as an I& measure in most psychiatric settings, and it in large part has given way to shorter group intelligence tests such as the Shipley-Hartford, the Army General Classification Test (AGCT) and the Revised Beta Examination. Previous research has indicated that each of these measures is capable of serving as a basis for WAIS I& estimates. Shipley-Wechsler r's ranging from .68 to 4-8* 10. 12) have been reported. Tamminen@) has reported an AGCT-WAIS r of .83 while Kellogg, Morton, Lindner and Gurvitz (a) and Woods and Myers(11) reported Beta-WAIS r's of .92 and .75 respectively.
Although these studies presumably justify the use of Beta-, AGCT-, and Shipley-based measures as WAIS surrogates, they do not help the clinician decide which substitute to employ. Since the r's are based on a variety of groups, it is not appropriate to base such a decision on a simple comparison of the correlations' magnitudes. Furthermore, several of the above studies failed to consider the possibilities of (a) systematic differences between the means of the group test estimates and WAIS IQ's and/or (b) differences in the variabilities of the measures, which could result in sizeable systematic errors among relatively bright and relatively dull individuals. Moreover, several of the aforementioned studies are based on non-random samples (e.g., that minority of patients whose fdes happen to include both group and WAIS I& scores), and the generalizability of their findings is therefore questionable.
This study compares the efficacies of three commonly used group tests (the Shipley-Hartford, the AGCT and the Revised Beta) as predictors of WAIS I& in a neuropsychiatric hospital setting.