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Journal of Korean Neurosurgical Society > Volume 48(6); 2010 > Article
Journal of Korean Neurosurgical Society 2010;48(6): 506-517.
doi: https://doi.org/10.3340/jkns.2010.48.6.506
Development of a Cognitive Level Explanation Model in Brain Injury : Comparisons between Disability and Non-Disability Evaluation Groups.
Tae Hee Shin, Chang Bong Gong, Min Su Kim, Jin Sung Kim, Dai Seg Bai, Oh Lyong Kim
1Department of Neurosurgery, College of Medicine, Yeungnam University, Daegu, Korea. olkim@med.yu.ac.kr
2Department of Neurosurgery, Dong Eui Medical Center, Busan, Korea.
3Department of Psychiatry, College of Medicine, Yeungnam University, Daegu, Korea.
We investigated whether Disability Evaluation (DE) situations influence patients' neuropsychological test performances and psychopathological characteristics and which variable play a role to establish an explanation model using statistical analysis.
Patients were 536 (56.6%) brain-injured persons who met inclusion and exclusion criteria, classified into the DE group (DE; n = 300, 56.0%) and the non-DE group (NDE; n = 236, 44.0%) according to the neuropsychological testing's purpose. Next, we classified DE subjects into DE cluster 1 (DEC1; 91, 17.0%), DE cluster 2 (DEC2; 125; 23.3%), and DE cluster 3 (DEC3; 84, 15.7%) via two-step cluster analysis, to specify DE characteristics. All patients completed the K-WAIS, K-MAS, K-BNT, SCL-90-R, and MMPI.
In comparisons between DE and NDE, the DE group showed lower intelligence quotients and more severe psychopathologic symptoms, as evaluated by the SCL-90-R and MMPI, than the NDE group did. When comparing the intelligence among the DE groups and NDE group, DEC1 group performed worst on intelligence and memory and had most severe psychopathologic symptoms than the NDE group did. The DEC2 group showed modest performance increase over the DEC1 and DEC3, similar to the NDE group. Paradoxically, the DEC3 group performed better than the NDE group did on all variables.
The DE group showed minimal "faking bad" patterns. When we divided the DE group into three groups, the DEC1 group showed typical malingering patterns, the DEC2 group showed passive malingering patterns, and the DEC3 group suggested denial of symptoms and resistance to treatment.
Key Words: Disability evaluation; Brain injury; Malingering
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