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  • Title: Detection of incomplete effort on the Wechsler Adult Intelligence Scale-Revised: a cross-validation.
    Author: Millis SR, Ross SR, Ricker JH.
    Journal: J Clin Exp Neuropsychol; 1998 Apr; 20(2):167-73. PubMed ID: 9777470.
    Abstract:
    This study determined whether the Vocabulary-Digit Span difference score and discriminant function based on subtests of the Wechsler Adult Intelligence Scale-Revised (WAIS-R) developed by Mittenberg et al. (1995) could differentiate patients with moderate and severe traumatic brain injuries (n = 50) from persons with financially compensable mild head injuries who were giving incomplete effort (n = 50). Employing modified cutoff scores, the discriminant function and Vocabulary-Digit Span difference score accurately classified 90% and 79% of the cases, respectively. Persons with traumatic brain injuries may produce WAIS-R subtest patterns that can be differentiated from individuals showing incomplete effort. These WAIS-R algorithms appear useful in making that distinction.
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