시공간 점화 과제에서 강박성향 집단의 촉진과 억제 효과
Facilitation and Inhibition Effects on Visuospatial Priming Task in Sub-Clinical Obsessive-Compulsive Subjects
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초록
본 연구는 시공간 점화과제를 통해 강박집단의 정서에 따른 촉진과 억제 효과를 알아보고 강박사고의 내용에 따른 하위집단 간 차이가 존재하는지 살펴보기 위한 목적으로 수행되었다. 대학생 902명을 대상으로 Padua 강박질문지-워싱턴 주립 대학 개정판(PI-WSUR)을 실시하여 점수에 따라 강박집단(22명)과 통제집단(21명)을 선정하였다. 실험에서는 중립정서 조건과 위협정서 조건으로 나누어 시공간 점화과제를 실시하였으며, 점화과제는 정적점화 조건, 기저선 조건, 부적점화 조건으로 이루어져 있다. 2(집단: 강박집단, 통제집단)⨯2(정서: 중립, 위협)⨯3(점화: 정적, 기저선, 부적)의 혼합설계 변량분석 결과, 점화의 주효과와 정서의 주효과가 유의했으며 점화와 정서의 상호작용이 있었다. 점화조건에 따라 촉진 점화량과 억제 점화량이 도출되는데, 촉진은 자극 부호화의 강도를 의미하며 억제는 불필요한 자극을 약화시키는 능력을 뜻한다. 촉진과 억제에 있어서 전체 강박집단과 통제집단 간의 유의한 차이는 나타나지 않았다. 강박집단을 강박사고 유형에 따라 자생성 강박사고 집단과 반응성 강박사고 집단으로 나누어 살펴본 결과, 중립정서 조건에서 자생성 강박사고 집단은 반응성 강박사고 집단에 비해 유의하게 증가된 촉진과 감소된 억제를 나타냈다. 반면 반응성 강박사고 집단은 통제집단과 비슷한 수행패턴을 나타냈다. 이는 자생성 강박사고 집단과 반응성 강박사고 집단의 이질성을 지지하며, 강박사고 유형에 따른 하위집단의 구분이 유용함을 시사한다.
Abstract
This study was conducted to investigate facilitation and inhibition effects in obsessive-compulsive subjects and to examine the difference between OC subtypes. 902 undergraduate university students were asked to complete the Padua Inventory-Washington State University Revision (PI-WSUR). Based on their PI-WSUR scores, 22 students were assigned to obsessive-compulsive group and 21 were assigned to the control group. Subjects performed visuospatial priming tasks under two emotional conditions: neutral and threat. The priming tasks had three conditions: positive priming, baseline, negative priming. The results of 2 (groups: OC, control) x 2 (emotion: neutral, threat) x 3 (priming: positive, baseline, negative) mixed ANOVA showed a significant main effect of emotion and priming and a significant interaction effect of emotion and priming. Based on the priming condition, the facilitation and inhibition effects were calculated. Facilitation is the strength of stimulus activation and inhibition effect refers to the ability to suppress an irrelevant stimulus. There was no statistically significant difference between the total OC group and the control group. According to factor analysis of PI-WSUR, the OC group was divided into two different subtypes: autogenous obsession and reactive obsession. In a neutral emotion condition, the autogenous obsession group showed increased facilitation and decreased inhibition compared with the reactive obsession group. On the other hand, the performance patterns of the reactive obsession group were similar to those of the control group. These findings support heterogeneity in the OC group and the usefulness of subtyping.
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