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  • Title: Values for comparison of WAIS-III index scores with overall means.
    Author: Longman RS.
    Journal: Psychol Assess; 2004 Sep; 16(3):323-5. PubMed ID: 15456387.
    Abstract:
    The Wechsler Adult Intelligence Scale--Third Edition (WAIS-III; Wechsler, 1997b) provides factor-based index scores but allows only for pairwise comparison of these scores, producing inflated Type I error rates and reducing profile interpretability. This article provides tables for simultaneous comparison to the overall mean index score, thus reducing error rates and aiding interpretation. The Working Memory Index or Processing Speed Index can also be specifically compared when an individual is believed to have a condition, such as a learning disability or traumatic brain injury, associated with the selective depression of these indexes. Tables for the infrequency of specific differences are also provided, allowing the practitioner to note how unusual an obtained difference is in the general population.
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