15.8 Additional Resources

• A gentle non-technical introduction to factor analysis
• Tutorial by a Psych 253 student at Stanford https://web.stanford.edu/class/psych253/tutorials/FactorAnalysis.html
• ggfortify vignette for the autoplot() function https://cran.r-project.org/web/packages/ggfortify/vignettes/plot_pca.html

The FactomineR looks promising, it has some helpful graphics for determining/confirming variable groupings and aiding interpretations.

• FactominR: http://factominer.free.fr/
• STHDA tutorial using FactominR http://www.sthda.com/english/articles/31-principal-component-methods-in-r-practical-guide/116-mfa-multiple-factor-analysis-in-r-essentials/