Department of Psychology.
School of Law.
Cultur Divers Ethnic Minor Psychol. 2011 Apr;17(2):175-185. doi: 10.1037/a0023356.
The Everyday Discrimination Scale (EDS), a widely used measure of daily perceived discrimination, is purported to be unidimensional, to function well among African Americans, and to have adequate construct validity. Two separate studies and data sources were used to examine and cross-validate the psychometric properties of the EDS. In Study 1, an exploratory factor analysis was conducted on a sample of African American law students (N = 589), providing strong evidence of local dependence, or nuisance multidimensionality within the EDS. In Study 2, a separate nationally representative community sample (N = 3,527) was used to model the identified local dependence in an item factor analysis (i.e., bifactor model). Next, item response theory (IRT) calibrations were conducted to obtain item parameters. A five-item, revised-EDS was then tested for gender differential item functioning (in an IRT framework). Based on these analyses, a summed score to IRT-scaled score translation table is provided for the revised-EDS. Our results indicate that the revised-EDS is unidimensional, with minimal differential item functioning, and retains predictive validity consistent with the original scale.
日常歧视量表（EDS）是一种广泛用于衡量日常感知歧视的测量工具，据称它具有单一维度、在非裔美国人中表现良好，并且具有足够的结构有效性。本研究使用了两个独立的研究和数据源来检验和交叉验证 EDS 的心理测量特性。在研究 1 中，对一组非裔美国法律学生（N=589）进行了探索性因素分析，为 EDS 中的局部依赖性或繁琐多维性提供了强有力的证据。在研究 2 中，使用一个独立的全国代表性社区样本（N=3527）来对项目因子分析中的确定的局部依赖性进行建模（即双因素模型）。接下来，进行项目反应理论（IRT）校准以获得项目参数。然后，在 IRT 框架下，对修订后的 EDS 进行性别差异项目功能障碍测试。基于这些分析，为修订后的 EDS 提供了一个总和分数到 IRT 刻度分数的转换表。我们的结果表明，修订后的 EDS 具有单一维度，最小的项目功能障碍差异，并保留与原始量表一致的预测有效性。
