情绪效价强度对抑郁症状个体认知控制的影响  

Effect of valence strengths of different emotional stimuli on cognitive control in individuals with depressive symptom

作　　者：李嘉雯[1] 冯正直[1] 廖成菊[1] 蒋娟[1] 王晓霞[1] 

机构地区：[1]第三军医大学护理学院心理学教研室,重庆400038

出　　处：《第三军医大学学报》2011年第10期1081-1084,共4页Journal of Third Military Medical University

基　　金：国家自然科学基金(30970898)~~

摘　　要：目的探讨情绪刺激效价强度对抑郁症状个体认知控制的影响。方法选取重庆某大学本科生,发放问卷600份,回收有效问卷585份。利用贝克抑郁量表(Beck depression inventory,BDI)和自评抑郁量表(self-rating depressionscales,SDS)进行筛选,得到抑郁症状被试23例和健康被试23例,利用经典的双选择情绪Oddball实验范式,比较在不同情绪刺激效价强度中两组被试对目标刺激反应的正确率和反应时差异。结果①正确率:健康组(F=11.221,P<0.01)与抑郁症状组(F=12.310,P<0.01)分别在情绪效价强度(愉悦度)上有显著差异,两组在高负性、中性和低正性中目标刺激的正确率均显著高于高正性和低负性(P<0.05)。②反应时:健康组(F=2.903,P<0.05)与抑郁症状组(F=3.256,P<0.05)分别在情绪效价强度上有显著差异;健康组在高负性、中性、低正性和高正性中目标刺激的反应时显著长于低负性(P<0.05);抑郁症状组在高负性和低正性中目标刺激的反应时显著长于中性和高正性(P<0.05)。结论情绪效价强度对抑郁症状个体的认知控制影响存在差异。随着负性情绪强度的增加,抑郁症状个体认知控制反应延迟;随着正性情绪强度的增加,抑郁症状个体认知控制反应提前。Objective To determine the effect of valence strengths of different emotional stimuli on cognitive control in individuals with depressive symptom.Methods Six hundred undergraduates from one university in Chongqing were tested with Beck depression inventory（BDI）,and Self-rating Depression Scale（SDS）.There were totally 585 valid questionnaires obtained.Among them,A total of 23 individuals with depressive symptom（mean age 20.8,male to female 9：14） and 23 age-and gender-matched health subjects were enrolled in this study.Emotional Oddball task was carried out on them to compare their accuracies and reaction times to target stimuli under the effect of valence strengths of different emotional stimuli.Results The accuracies data showed that there was significant difference in different valence strength for health group（F=11.221,P0.01）,and also for depressive symptom group（F=12.310,P0.01）.The accuracies of target stimulus in highly negative,neutral and moderately positive were significant higher than highly positive and moderately negative in either group（P0.05）.But there was no difference between highly positive and moderate negative.The data on reaction times showed that there was significant difference in different valence strength for health group（F=2.903,P0.05）.The reaction times of target stimulus in highly negative,neutral,moderately positive and highly positive were significant longer than moderately negative（P0.05）.There was also significant difference in different valence strength for depressive symptom group（F=3.256,P0.05）.The reaction times of target stimulus in highly negative and moderately positive were longer than neutral and high positive（P0.05）.Conclusion Different emotional stimuli have different effects on cognitive control in the individuals with depressive symptom.The depressed would be delayed to cognitive control when valence intensity of negative stimuli is increasing,while they would advance to cognitive control when that of positive stimuli is increasin

关 键 词：情绪 效价 认知控制 抑郁症状 影响 

分 类 号：R338.64[医药卫生—人体生理学] R749.42[医药卫生—基础医学]