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KMID : 1118520200170060526
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Psychiatry Investigation
2020 Volume.17 No. 6 p.526 ~ p.532
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Detection of Malingering Using Wechsler Adult Intelligence Scale-IV for Psychiatric Patients
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On An-Kook
Hwang Kyu-Sic
Jang Seung-Ho
Lee Hye-Jin
Soh Min-Jung
Yang Chan-Mo
Lee Sang-Yeol
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Abstract
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Objective: Psychiatric patients sometimes show poor performance or exaggerated symptoms as malingering for secondary gain. The aim of this study was to introduce cut-off scores for detecting poor performance using Wechsler Adult Intelligence Scale (WAIS) in psychiatric patients.
Methods: Participants were 261 in- and out-patients who visited psychiatry department. They were classified into 4 group-1) military service, 2) traumatic brain injury (TBI), 3) psychosis, 4) neurosis. A Digit Span subtest (called as Reliable Digit Span, RDS) of WAIS was used to detect malingering. This study considered a score of 10% base rate as RDS cut-off score.
Results: The RDS cut-off score was shown at 7 pts for military service group, at 3 pts for TBI group, at 6 pts for psychosis group, and at 6 pts for neurosis group.
Conclusion: This study first introduced RDS cut-off scores for malingering psychiatric patients in South Korea. In clinical practice, clinicians may be able to utilize the RDS cut-off scores for malingering-suspected patients. In particular, for patients with military service issues, 7 or less pts of RDS can be used for detecting and inferring their malingering.
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KEYWORD
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Malingering, Performance validity, WAIS-IV, Reliable Digit Span, Military service
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