作为调节中介模型的均匀和非均匀差异项目功能（DIF）的MIMIC模型
MIMIC Models for Uniform and Nonuniform DIF as Moderated Mediation Models.
作者信息
Montoya Amanda K, Jeon Minjeong
机构信息
University of California, Los Angeles, USA.
出版信息
Appl Psychol Meas. 2020 Mar;44(2):118-136. doi: 10.1177/0146621619835496. Epub 2019 Apr 12.
In this article, the authors describe how multiple indicators multiple cause (MIMIC) models for studying uniform and nonuniform differential item functioning (DIF) can be conceptualized as mediation and moderated mediation models. Conceptualizing DIF within the context of a moderated mediation model helps to understand DIF as the effect of some variable on measurements that is not accounted for by the latent variable of interest. In addition, useful concepts and ideas from the mediation and moderation literature can be applied to DIF analysis: (a) improving the understanding of uniform and nonuniform DIF as direct effects and interactions, (b) understanding the implication of indirect effects in DIF analysis, (c) clarifying the interpretation of the "uniform DIF parameter" in the presence of nonuniform DIF, and (d) probing interactions and using the concept of "conditional effects" to better understand the patterns of DIF across the range of the latent variable.
在本文中，作者描述了用于研究均匀和非均匀项目功能差异（DIF）的多指标多原因（MIMIC）模型如何被概念化为中介模型和调节中介模型。在调节中介模型的背景下对DIF进行概念化，有助于将DIF理解为某个变量对测量结果的影响，而该影响未被感兴趣的潜在变量所解释。此外，中介和调节文献中的有用概念和思想可以应用于DIF分析：（a）将均匀和非均匀DIF理解为直接效应和相互作用，从而加深理解；（b）理解DIF分析中间接效应的含义；（c）在存在非均匀DIF的情况下，阐明“均匀DIF参数”的解释；（d）探究相互作用，并使用“条件效应”的概念来更好地理解潜在变量范围内的DIF模式。
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