Alternate Form Reliability of Nine Possible Four-Subtest Combinations of the Cognitive Proficiency Index for the Wechsler Adult Intelligence Scale-IV (WAIS-IV) in a Clinical Sample

Authors

Joseph J. Ryan, University of Central Missouri
David S. Kreiner, University of Central Missouri
Charles Golden, Nova Southeastern UniversityFollow
Gordon Teichner, Charleston Neuropsychology
Samuel T. Gontkovsky, Empower Behavioral Health and InterventionFollow

Abstract

Performance on the core working memory (Digit Span + Arithmetic) and processing speed (Coding + Symbol Search) subtests of the WAIS-IV is summarized by the Cognitive Proficiency Index (CPI). If a working memory subtest is spoiled, Letter-Number Sequencing is substituted. An invalidated processing speed subtest is replaced by Cancellation. These tasks are supplementary. The core and supplementary subtests yield nine four-subtest composites. Using the standardization sample, Campbell, Rossini, and Johnson (2022) demonstrated that all CPI tetrads had excellent alternate form reliability. In the present study, a clinical sample (n = 90) produced equally high reliabilities. Four of the new composites estimated CPIs that fell within + 2 SEMs of the original composite ≥ 94.2% of the time. The magnitudes of the GAI – CPI differences across the nine alternate forms were similar, and the typical pattern was GAI > CPI.

Recommended Citation

Ryan, Joseph J.; Kreiner, David S.; Golden, Charles; Teichner, Gordon; and Gontkovsky, Samuel T. (2025) "Alternate Form Reliability of Nine Possible Four-Subtest Combinations of the Cognitive Proficiency Index for the Wechsler Adult Intelligence Scale-IV (WAIS-IV) in a Clinical Sample," Archives of Assessment Psychology: Vol. 15, Article 3.
Available at: https://nsuworks.nova.edu/psyassessment/vol15/iss1/3