Factor invariance in longitudinal studies: Measuring the same construct across time

TIMS Acta Pub Date : 2021-01-01 DOI:10.5937/timsact15-34623
Marija Volarov
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Abstract

When researchers are conducting studies that require repeated measures, it is not uncommon for them to assume that the particular instrument is equally going to assess the latent construct of interest no matter how many times the instrument (test) is administered. In other words, it is not in question whether the properties of the test are likely to change or not. However, measurement invariance is not something that the instrument possesses by default. Measurement invariance has to be tested. The aim of this paper was to provide an insight into testing factorial invariance performing the confirmatory factor analysis on a set of longitudinal data. The first part of this paper is theoretical and describes different forms of invariance. The second part offers a concrete example and a step-by-step guide on how to perform confirmatory factor analysis for repeated measurements to test the invariance using statistical software R.
纵向研究中的因素不变性:测量跨时间的相同结构
当研究人员进行需要重复测量的研究时,他们通常会假设,无论使用多少次工具(测试),特定的工具都能同样地评估感兴趣的潜在构念。换句话说,测试的性质是否可能改变并不是问题。然而,测量不变性不是仪器默认拥有的东西。必须测试测量不变性。本文的目的是提供一个洞察测试的析因不变性执行验证性因素分析对一组纵向数据。本文的第一部分是理论性的,描述了不变性的不同形式。第二部分提供了一个具体的示例,并逐步指导如何使用统计软件R对重复测量执行验证性因子分析以测试不变性。
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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