Comparison of tetradic WAIS-III short forms in predicting full scale IQ scores in neuropsychiatric clinic settings

Gregory W. Schrimsher, Sid E. O'Bryant, Judith R. O'Jile, Patricia B. Sutker

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Patients from two neuropsychology clinics (n=283) were divided into model development (n=189) and validation samples (n=94) with proportional representation from each clinic. Three regression based models of four WAIS-III subtests were developed and cross-validated to evaluate their FSIQ estimation accuracy: (1) an optimized stepwise regression model derived from the development sample (Comprehension, Matrix Reasoning, Similarities, and Picture Arrangement), (2) an a priori WASI based model (Similarities, Matrix Reasoning, Vocabulary, and Block Design), and (3) an a priori model with relatively rapidly administered subtests from each Index Score factor of the WAIS-III (Information, Picture Completion, Arithmetic, and Digit Symbol-Coding). The models produced good (92 to 97%) FSIQ estimation accuracy within 10 points of FSIQ with none of these models performing significantly better than another. The utility of clinical use of short form FSIQ estimation is a function of accuracy needed versus administration time reduction and ease for the patient.

Original languageEnglish
Pages (from-to)235-240
Number of pages6
JournalJournal of Psychopathology and Behavioral Assessment
Volume30
Issue number3
DOIs
StatePublished - 1 Sep 2008

Keywords

  • Assessment
  • IQ prediction
  • Intelligence
  • Short form
  • WAIS-III

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