Improving Your Exploratory Factor Analysis for Ordinal Data: A Demonstration Using FACTOR.

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Exploratory Factor Analysis: A Guide to Best Practice (2018, methodology): “Results from both simulated and real data have converged to indicate that polychoric correlations are more likely to recover the true factor model than are Pearson correlations (Baglin, 2014; Barendse, Oort, & Timmerman, 2015; Flora et al., 2012; Holgado-Tello et al., 2010; Lee, Zhang, & Edwards, 20”
Exploratory factor analysis: Current use, methodological developments and recommendations for good practice (2019, methodology): “Baglin (2014) nicely illustrated this issue and also recommended polychoric correlations for these cases.”