挫败感量表对医学生焦虑抑郁态的信效度评估

Reliability and validity of defeat scale on anxiety and depression in medical students

目的·引入挫败感量表(defeat scale,DS),评价该量表在低年级医学生中测量的信度和效度。方法·将由Gilbert和Allan编制的DS汉化后,使用方便抽样的方法对某医学院低年级共665名医学生进行评测,并于1个月后对其中29名学生进行重测。采用因子分析、相关分析探索中文版量表的结构效度、校标效度及内容效度。采用内部一致性信度(Cronbach'sα系数)、对半信度(Spearman-Brown系数)及重测信度3个指标检测量表的信度。结果·探索性因子分析显示,该量表可提取2个因子即颓败感(13个条目)和低成就感(3个条目)。验证性因子分析显示,两因子修正的模型拟合情况优良(χ~2/df=7.199,RMSEA=0.097,CFI=0.925)。内容效度各条目与所属分维度的相关系数在0.678~0.889之间。DS与抑郁症筛查量表以及与罗森伯格自尊量表的相关系数分别为0.738和-0.712;且DS的Cronbach′sα系数为0.933,Spearman-Brown系数为0.925,重测信度高于0.900。结论·DS在低年级医学生群体中具有良好的效度和信度。

Objective·To introduce the defeat scale(DS)and evaluate its reliability and validity among Chinese junior medical students.Methods·With convenience sample method,665 medical students were examined by the Chinese version of DS,and 29 of them were retested one month later.The structural validity,criterion validity,and content validity of DS were accessed by factor analysis and correlation analysis.The reliability of DS was evaluated by internal consistency reliability(Cronbach'sαcoefficient),split-half reliability(Spearman-Brown coefficient),and retest reliability.Results·The exploratory factor analysis showed that two factors including decadence(13 items)and low sense of achievement(3 items)could be extracted.Confirmatory factor analysis showed that model revised by two factors fitted well(χ2/df=7.199,RMSEA=0.097,CFI=0.925).The correlation coefficient between each item of content validity and its sub-dimension were among 0.678-0.889.The correlation coefficient was 0.738 between DS and patients'health questionnaire depression scale-9 item,and-0.712 between DS and Rosenberg self-esteem scale.The Cronbach'sαcoefficient of DS was 0.933,the Spearman-Brown coefficient was 0.925,and the retest reliability was higher than 0.900.Conclusion·The DS has good validity and reliability among Chinese junior medical students.