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Disturbances of motivational balance in chronic schizophrenia during decision-making tasks

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Author(s)
Yang-Tae KimHansem SohnSeungyeon KimJihoon OhBradley S. PetersonJaeseung Jeong
Keimyung Author(s)
Kim, Yang Tae
Department
Dept. of Psychiatry (정신건강의학)
Journal Title
Psychiatry and Clinical Neurosciences
Issued Date
2012
Volume
66
Issue
7
Keyword
decision-makinggambling taskmotivational balancereversal learningschizophrenia
Abstract
Aim: The role of feedback processing in decisionmaking
has been assessed in psychiatric patients
using the Iowa Gambling Task (IGT). Although
impaired performance on the IGT has been documented
extensively in schizophrenia patients, the
neuropsychological mechanisms underlying the performance
deficits have not yet been elucidated. Therefore,
the aim of this study was to investigate the
neuropsychological origins of impaired decisionmaking
in schizophrenia patients using various versions
of the IGT.
Methods: Thirty chronic schizophrenia patients and
33 healthy subjects underwent computerized versions
of the IGT, the Variant Gambling Task (VGT),
and the Shuffled Gambling Task (SGT) to assess the
contributions of motivational balance and reversal
learning on IGT performance. In addition, performance
on the Wisconsin Card-Sorting Test (WCST)
was assessed.
Results: The schizophrenia patients exhibited deficits
on the IGT and SGT, particularly in later trials. No
significant group difference was detected on the VGT
due to the improved performance of schizophrenia
patients in the earlier trials. Performance on the gambling
tasks in the schizophrenia group did not correlate
with performance on the WCST or with the
severity of clinical symptoms.
Conclusion: Deficits in motivational balance, but
not reversal learning, play a dominant role in
the impaired decision-making of patients with
schizophrenia.
Key words: decision-making, gambling task, motivational
balance, reversal learning, schizophrenia.
Keimyung Author(s)(Kor)
김양태
Publisher
School of Medicine
Citation
Yang-Tae Kim et al. (2012). Disturbances of motivational balance in chronic schizophrenia during decision-making tasks. Psychiatry and Clinical Neurosciences, 66(7), 573–581. doi: 10.1111/j.1440-1819.2012.02403.x
Type
Article
ISSN
1323-1316
DOI
10.1111/j.1440-1819.2012.02403.x
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/33458
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Psychiatry (정신건강의학)
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