摘要目的 评价综合性工作能力指数(Comprehensive Work Ability Index, CWAI)量表的信度与效度.方法 采用整群随机抽样方法抽取行政机关、教育等行业的1959例在职职工作为研究对象,其中,重测信度和效标效度评价的测试对象分别为245例、86例.方法 采用组内相关系数法、同质性信度分析和因子分析等方法评价CWAI量表的信度与效度.结果 CWAI量表各条目(W1-1～W5)得分与量表总分(CWAI)的相关系数介于0.250～0.750之间(P＜0.01);总体而言,Cronbach's ?系数(0.701～0.808)、Spearman-Brown系数(0.860)、?系数(0.703～0.845)和?系数(0.802～0.942)均符合心理测量学对量表的测量要求;CWAI量表的条目得分、量表总分2次测量之间的组内相关系数(ICC)介于0.597～0.897之间(P＜0.01),属于一致性"良好".从量表理论结构与编制方法看,CWAI量表的内容效度较好;采用芬兰WAI量表作为效标,CWAI量表的效标效度为0.65(P＜0.01);因子分析结果显示,CWAI量表结构比较明确,共提取8个公因子,累计贡献率为71.894%,条目W1-1～W5的公因子方差均在0.60以上,在各自所属公因子上的因子负荷(0.538～0.948)均高于0.40,CWAI量表的高负荷因子与量表的理论构想基本吻合.结论 CWAI量表具有较好的信度与效度.

abstractsObjective To test the reliability and the validity of Comprehensive Work Ability Index (CWAI) scales. Methods For evaluating the reliability and validity of CWAI scales, 1959 subjects employed in various kinds of occupations were selected with the random cluster sampling method. 245 subjects of them were retested at intervals of 2 to 4 weeks in order to assess the test-retest reliability. The sample for criterion validity consisted of 86 subjects. The inter-item consistency (Cronbach's ? coefficient, Spearman-Brown coefficient, ? coefficient and ? coefficient), test-retest reliability ( intra-class correlation coefficent) and Pearson correlation were calculated to assess the reliability of CWAI scales. Pearson correlation analysis, and factor analysis were used to assess the validity of CWAI scales. Results The reliability analysis showed that CWAI was significantly correlated with the item scores (P＜0.01 ), and most of the correlation coefficients were higher than 0.30. Generally speaking, Cronbach's ? coefficients (ranging from 0.701 to 0.808 ), ? coefficient(ranging from 0.703 to 0.845) and ? coefficient (ranging from 0.802 to 0.942) and Spearman-Brown coefficient (0.860) conformed to the requirements of psychometric study. The intra-class correlation coefficient (ranging from 0.597 to 0.897) suggested that the test-retest consistency was good at intervals of 2 to 4 weeks. In point of the theoretic concept and development method, the content validity of CWAI scales was satisfactory. The intraclass correlation coefficient for the concurrent validity was 0.650 (P＜0.01 ) when WAI scales were taken as the criterion. Factor analysis revealed that when eight common factors were drawn from the 17 items of CWAI scales, the cumulative variance of eigenvalues amounted to 71.894%. Each item had communality over 0.60 and its factor loading (0.538～0.948 ) attached to the relevant common factor was over 0.40. The common factors with higher factor loading were basically consistent with the theoretic concept of CWAI scales. Conclusion CWAI scales are reliable and valid.