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Assessment
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A Comparison of Nine WAIS-R Short Forms in Individuals with Mild to Severe Traumatic Brain Injury

Thomas J. Guilmette

Providence College, Southern New England Rehabilitation Center

John Dabrowski

Rehab Solutions, Tampa, Florida

Mary Lynne Kennedy

Southern New England Rehabilitation Center, Providence, Rhode Island

Judith Gnys

Providence, Rhode Island

Scores from nine WAIS-R short forms were calculated for a sample of 75 adults with mild to severe traumatic brain injury (TBI). Although all nine of the short forms were significantly correlated with the WAIS-R Full Scale IQ, three of the short forms (Vocabulary-Block Design; Vocabulary-Block Design-Arithmetic-Similarities; VocabularyArithmetic-Picture Arrangement-Block Design) significantly overestimated the WAIS-R IQ and thus may be inappropriate to use with this population. The remaining six short forms did not differ significantly from the WAIS-R Full Scale IQ. Among these six, Ward's seven-subtest short form appeared to exhibit the least variability in predicting the WAIS-R Full Scale IQ. Information is presented and discussed regarding the absolute difference scores between short form IQ estimates and the WAIS-R as well as the proportion of short forms which significantly underand overestimate the Full Scale IQ.

Key Words: Traumatic brain injury • intelligence • intelligence testing • cognition • IQ • IQ short forms

Assessment, Vol. 6, No. 1, 33-41 (1999)
DOI: 10.1177/107319119900600104
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