Estimating WAIS-IV Indexes: Proration Versus Linear Scaling in a Clinical Sample

We compared the accuracy of proration and linear scaling for estimating Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV), Verbal Comprehension Index (VCI), and Perceptual Reasoning Index (PRI) composites from all possible two subtest combinations. The purpose was to provide practice relevant psychometric results in a clinical sample.The present investigation was an archival study that used mostly within-group comparisons. We analyzed...