Self-Evaluation, Differential Item Functioning, and Longitudinal Anchoring Vignettes

O. Paccagnella
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引用次数: 2

Abstract

Anchoring vignettes are a powerful instrument to detect systematic differences in the use of self-reported ordinal survey responses. Not taking into account the (non-random) heterogeneity in reporting styles across different respondents may systematically bias the measurement of the variables of interest. The presence of such individual heterogeneity leads respondents to interpret, understand, or use the response categories for the same question differently. This phenomenon is defined as differential item functioning (DIF) in the psychometric literature. A growing amount of cross-sectional studies apply the anchoring vignette approach to tackle this issue but its use is still limited in the longitudinal context. This chapter introduces longitudinal anchoring vignettes for DIF correction, as well as the statistical approaches available when working with such data and how to investigate stability over time of individual response scales.
自我评价、差异项目功能和纵向锚定小片段
锚定小插曲是一个强大的工具,以检测在使用自我报告的有序调查反应的系统差异。不考虑不同受访者报告风格的(非随机)异质性,可能会系统性地影响感兴趣变量的测量。这种个体异质性的存在导致受访者对同一问题的回答类别有不同的解释、理解或使用。这种现象在心理测量学文献中被定义为差分项目功能(DIF)。越来越多的横断面研究应用锚定小片段方法来解决这个问题,但它的使用在纵向背景下仍然有限。本章介绍用于DIF校正的纵向锚定图像,以及处理此类数据时可用的统计方法,以及如何调查个体响应量表随时间的稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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