Abstract
In this article, a Windows program for analyzing measurement invariance in two different populations is described. Factor analysis is a common way of assessing measurement invariance, and restricted factor analysis is now the most popular method. However, applied researchers have usually found that the theoretical advantages of restricted factor analysis do not always apply in practical situations. For example, when the participant sample is large, as is the case in Internet-based questionnaires, the available software for restricted factor analysis might fail to converge on a solution. Our program is based on unrestricted factor analysis and considers the three parameters that define factor invariance: difficulties, discriminations, and residual variances. The statistical significance of the tests for evaluating invariance is obtained using Bootstrap resampling procedures. A real-life example demonstrates the usefulness of the program.
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This research was supported by the Direction General de Investigación Científica y Técnica and the European Fund for Regional Economic Development (SEC2001-3821-C05-02).
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Lorenzo-Seva, U., Ferrando, P.J. IMINCE: An unrestricted factor-analysis-based program for assessing measurement invariance. Behavior Research Methods, Instruments, & Computers 35, 318–321 (2003). https://doi.org/10.3758/BF03202558
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DOI: https://doi.org/10.3758/BF03202558