Exploratory factor analysis example

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Example of exploratory factor analysis workflow based on the article by Mesquita and Lazzarini, 2008. Explains factor rotation, factor loadings, commonality, uniqueness, and Harman's single-factor test.

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Hi teacher.
Please help me with the following:
1.- What is the difference between using the polychoric correlation matrix vs Pearson for an EFA? In social sciences, it is common to work with a Likert scale (1 to 5).
2.- What is your opinion of using the parallel method to explore the number of factors?
3.- Which method do you recommend or have the best performance: MINRES, Ml, PAF?

Thank you very much!

cracrul