정신분열병 환자에서 개념형성훈련이 위스콘신카드분류검사 수행능력에 미치는 효과

Abstract

Objectives : Schizophrenic patients perform poorly on the Wisconsin Card Sorting Test(WCST). This study evaluated the effect of concept formation training on the performance of WCST in schizophrenic patients. Method '• Twenty two DSM-IV schizophrenic patients, who were hospitalized with acute symptoms and completed less than 4 categories on the pretraining WCST, received a training on a hierarchical cummulative concept formation. In this training, the subjects were trained to classify cards by a single dimension of color, form and number respectively. After mastering a single category classification, the subjects moved to classify cards by two dimensions of form and number. Last step was to classify cards by three dimensions of color, form and number as for WCST. In one week after the subjects mastered the training, WCST was readministered. Results ■- Sixteen patients completed training successfully. There were significant improvement in the number of trials administered, total number of corrects, total number of errors, perseverative responses, perseverative errors, conceptual level responses, number of categories completed and trials to complete first category after training, but nonperseverative errors and failure to maintain set did not improve. Conclusions : This results not only confirmed that a subgroup of schizophrenic pateints were able to improve their WCST performance by remedial training, but also showed that schizophrenic patients were able to apply a learned concept to a different task.