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nFactors (version 2.3.1)
Parallel Analysis and Non Graphical Solutions to the Cattell
Scree Test
Description
Indices, heuristics and strategies to help to determine
the number of factors/components to retain: 1. Acceleration
factor (af with or without Parallel Analysis); 2. Optimal
Coordinates (noc with or without Parallel Analysis); 3.
Parallel analysis (components, factors and bootstrap); 4.
lambda > mean(lambda) (Kaiser, CFA and related); 5.
Cattell-Nelson-Gorsuch (CNG); 6. Zoski and Jurs multiple
regression (b, t and p); 7. Zoski and Jurs standard error of
the regression coeffcient (sescree); 8. Nelson R2; 9. Bartlett
khi-2; 10. Anderson khi-2; 11. Lawley khi-2 and 12.
Bentler-Yuan khi-2.