The present study attempted to evaluate the effectiveness of the Shipley-Hartford and Wonderlic in the prediction of Full Scale WAIS—R IQs while controlling for subjects' reading ability. 34 psychiatric patients from the Waco VA Medical Center who had attained at least a sixth-grade reading level on the basis of the Wide Range Achievement Test—Revised were administered the WAIS—R, Shipley-Hartford and Wonderlic in random order. Significant correlations were found between Full Scale WAIS—R IQs and age-corrected WAIS—R equivalent scores for the Shipley-Hartford and the Wonderlic. The results of these and other analyses supported the view that both the Shipley-Hartford and Wonderlic are accurate in making gross estimates of Full Scale WAIS—R IQs. The results are discussed in the context of previous research, using both clinical and nonclinical samples. Clinical implications and suggestions for research, including further methodological refinements, are also discussed
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