Two Abbreviated Versions of the Wechsler Adult Intelligence Scale—III: Validation Among Persons With Traumatic Brain Injury


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Abstract

ABSTRACT.Objective:To examine the clinical value of two 7-subtest versions of the Wechsler Adult Intelligence Scale—III (WAIS–III): one using Block Design (WAIS–III/BD7) and another using Matrix Reasoning (WAIS–III/MR7) among persons with traumatic brain injury (TBI).Study Design:Actual obtained scores from the full WAIS–III were compared with scores that would have been obtained using each of the two abbreviated versions.Participants:One hundred eighteen persons with TBI tested consecutively in an academic medical center outpatient neuropsychology laboratory.Results:For the WAIS–III/BD7, corrected validity coefficients were .97 (Verbal IQ [VIQ]), .94 (Performance IQ [PIQ]), and .97 (Full Scale IQ [FSIQ]); 92%, 70%, and 92% of scores fell within 5 points of full version scores for VIQ, PIQ, and FSIQ, respectively. WAIS–III/MR7 corrected validity coefficients were .97 (VIQ), .95 (PIQ), and .97 (FSIQ); 92%, 76%, and 92% of short-form scores were within 5 points of actual scores for VIQ, PIQ, and FSIQ, respectively.Conclusions:Both abbreviated versions demonstrated acceptable psychometric characteristics, but the matrix reasoning version may be more advantageous in assessing persons with TBI because it can be used with persons who have TBI-related motor skills impairment.

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