Investigated the validity of the Arithmetic + Vocabulary + Picture Arrangement + Block Design subtest combination as an estimate of the WAIS‐R Full Scale IQ in a smaple of 55 elderly patients. The correlation between the short‐form IQ and the WAIS‐R Full Scale IQ was highly significant, r(53) = 0.95, p < 0.001. A pairwise t‐test computed between the mean IQs for the two forms was nonsignificant, t(54) < 1. Approximately one‐fourth of the Ss showed changes in intelligence classification levels when the short form was used. The short form does not provide a precise estimate of IQ; however, it appears to have clinical utility as a screening device to identify patients with atypical cognitive functioning. The short form correctly categorized 84% of the current sample with respect to the presence or absence of abnormalities on the full WAIS‐R.
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