Stone Mark H
Adler School of Professional Psychology, 65 East Wacker Place, Chicago, IL 60601, USA.
J Appl Meas. 2003;4(3):282-97.
Variable construction requires careful attention to substantive issues; a theory guiding its development, a hierarchy of illustrative items constructed to define the variable, the subsequent production of item difficulties and person measures, and the analysis of fit. Rasch measurement practitioners should give careful attention to these matters so practical suggestions are given for designing variables based on theory, item construction, and Rasch models for the analysis of data. Variable maps are emphasized to guide variable construction and interpret the results.
变量构建需要仔细关注实质性问题；指导其发展的理论、为定义变量而构建的一系列说明性项目、随后生成的项目难度和人员测量值，以及拟合分析。Rasch测量从业者应仔细关注这些事项，因此针对基于理论、项目构建和用于数据分析的Rasch模型设计变量给出了实用建议。强调使用变量图来指导变量构建并解释结果。
