Detection of incomplete effort on the Wechsler Adult Intelligence Scale-Revised: a cross-validation.
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.
Millis
S R
SR
Department of Psychology, Rehabilitation Institute of Michigan, Detroit 48201, USA. smillis@med.wayne.edu
Ross
S R
SR
Ricker
J H
JH
D000328:Adult; D000465:Algorithms; D001925:Brain Damage, Chronic / Q000175:diagnosis* / Q000523:psychology / Q000534:rehabilitation; D001930:Brain Injuries / Q000175:diagnosis* / Q000523:psychology / Q000534:rehabilitation; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008306:Malingering / Q000175:diagnosis* / Q000523:psychology; D008875:Middle Aged; D005082:Physical Exertion; D011594:Psychometrics; D014825:Vocabulary; D014888:Wechsler Scales / Q000706:statistics & numerical data*