EstimatingWAIS-IVIndexes:ProrationVersusLinearScaling inaClinicalSample

We compared the accuracy of proration and linear scaling for estimating WechslerAdult Intelligence Scale–Fourth Edition (WAIS-IV), Verbal Comprehension Index (VCI), and PerceptualReasoning Index (PRI) composites from all possible two subtest combinations. The purpose was toprovide practice relevant psychometric results in a clinical sample.