Equal weighting vs. differential weighting of subtest scores on short forms of Wechsler's Intelligence Scales.

Data from the standardization samples for the WISC-R, the WPPSI, and the WAIS-R were employed to compare the validities and reliabilities of each of several short forms, using (a) the multiple regression weights based on those data, and (b) equal weights. For the short forms of the WISC-R, comparisons were also made using (c) the multiple regression weights reported by the investigators who proposed the short forms, based on their data. The validities and reliabilities varied little from one set of weights to another, so that a strong case can be made for the use of equal weights, which also possess the advantages of simpliciity and robustness.