Orlando Maria, Marshall Grant N
RAND, 1700 Main Street, P.O. Box 2138, Santa Monica, California 90407-2138, USA.
Psychol Assess. 2002 Mar;14(1):50-9. doi: 10.1037//1040-3590.14.1.50.
This study demonstrated the application of an innovative item response theory (IRT) based approach to evaluating measurement equivalence, comparing a newly developed Spanish version of the Posttraumatic Stress Disorder Checklist-Civilian Version (PCL-C) with the established English version. Basic principles and practical issues faced in the application of IRT methods for instrument evaluation are discussed. Data were derived from a study of the mental health consequences of community violence in both Spanish speakers (n = 102) and English speakers (n = 284). Results of differential item functioning (DIF) analyses revealed that the 2 versions were not fully equivalent on an item-by-item basis in that 6 of the 17 items displayed uniform DIF. No bias was observed, however, at the composite PCL-C scale score, indicating that the 2 language versions can be combined for scale-level analyses.
本研究展示了一种基于创新项目反应理论（IRT）的方法在评估测量等效性方面的应用，该方法将新开发的西班牙语版创伤后应激障碍检查表-平民版（PCL-C）与已确立的英语版进行比较。讨论了IRT方法在工具评估应用中面临的基本原理和实际问题。数据来自一项关于社区暴力对说西班牙语者（n = 102）和说英语者（n = 284）心理健康影响的研究。差异项目功能（DIF）分析结果显示，这两个版本在逐个项目的基础上并非完全等效，因为17个项目中有6个显示出一致的DIF。然而，在PCL-C综合量表得分上未观察到偏差，这表明这两个语言版本可合并用于量表水平的分析。
