Detection of Incomplete Effort on the Wechsler Adult Intelligence Scale-Revised: A Cross-Validation

Scott R. Millis · Scott R. Ross · Joseph H. Ricker

57 citations0/0 files storedJournal of Clinical and Experimental Neuropsychology

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Psychological Testing and Assessment Traumatic Brain Injury Research Deception detection and forensic psychology

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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References

1955Antecedent probability and the efficiency of psychometric signs, patterns, or cutting scores.1990A national survey of psychologists who offer neuropsychological services

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2006Sensitivity and Specificity of Various Digit Span Scores in the Detection of Suspect Effort 2005On the diagnosis of malingered pain-related disability: lessons from cognitive malingering research 2000Detecting Exaggeration and Malingering in Neuropsychological Assessment 2006On the limits of effort testing: Symptom validity tests and severity of neurocognitive symptoms in nonlitigant patients 2003Detecting malingering on the WAIS-III Unusual Digit Span performance patterns in the normal population and in clinical groups 2006Ethical Issues Associated With the Assessment of Exaggeration, Poor Effort, and Malingering 2018The D-KEFS Trails as performance validity tests.2019Stronger Together: The Wechsler Adult Intelligence Scale—Fourth Edition as a Multivariate Performance Validity Test in Patients with Traumatic Brain Injury

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