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ORIGINAL ARTICLE
Year : 2019  |  Volume : 39  |  Issue : 2  |  Page : 81-89

Detection of malingering in the memory of patients with dementia: A pilot study on coin-in-the-hand test in a Northern Taiwan Memory Clinic


1 Department of Psychiatry, Tri Service General Hospital, School of Medicine, Taipei, Taiwan
2 School of Public Health, Tri Service General Hospital, Taipei, Taiwan
3 Department of Psychiatry, School of Medicine; Department of Nursing, Tri Service General Hospital; School of Nursing, Tri Service General Hospital, Song Shan Branch; Department of Nursing, Kang Ning University, Taipei; Institute of Bioinformatics and System Biology, National Chiao Tung University, Hsin Chu, Taiwan
4 Department of Psychiatry, School of Medicine; Department of Psychiatry, Tri Service General Hospital, Song Shan Branch, Taipei, Taiwan
5 Department of Surgery; Department of Emergency Medicine, Tri Service General Hospital, School of Medicine; Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
6 Department of Psychiatry, Tri Service General Hospital, School of Medicine; Student Counseling Center, National Defense Medical Center, Taipei, Taiwan

Correspondence Address:
Dr. Nian-Sheng Tzeng
Department of Psychiatry, National Defense Medical Center, Tri-service General Hospital, 325, Section 2, Cheng-kung Road, Neihu District, Taipei City 11490
Taiwan
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jmedsci.jmedsci_100_18

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Background: The aim of this study is to investigate the validity of the coin-in-the-hand (CIH) test with other neuropsychological tests for the detection of malingering in the memory. Materials and Methods: A simulated scenario design was developed to investigate the validity of the CIH test, entitled the Test of Memory Malingering (TOMM), associated with the Clinical Dementia Rating, the cognitive abilities screening instrument, the Mini-Mental Status Examination, and the WHO Quality of Life-BREF. The performances of the patients with dementia (n = 25) were compared with one group of normal controls (n = 9), and another group instructed to simulate malingering dementia (n = 19). Results: The CIH test demonstrated good validity and displayed a better sensitivity and a positive likelihood ratio than the TOMM, while patients with dementia could provide, on average, more than nine correct answers, in comparison to only more than six correct answers in the simulated malingering group. The optimal cutoff score of the CIH test is ≤8. Conclusions: This pilot study showed that the CIH test is a quick and practical test for detecting malingering in the memory.


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