14.8 References

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Crocker, L., & Algina, J. (1986). Introduction to classical and modern test theory. Holt, Rinehart, & Winston.

Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16, 297—334.

DeVellis, R. F. (2017). Scale development: Theory and applications (4th ed.). SAGE.

Fabrigar, L. R., Wegener, D. T., MacCallum, R. C., & Strahan, E. J. (1999). Evaluating the use of exploratory factor analysis in psychological research. Psychological Methods, 4(3), 272—299.

Friendly, M. (2017). Working with categorical data with R and the vcd and vcdExtra packages. Retrieved at http://cran.nexr.com/web/packages/vcdExtra/vignettes/vcd-tutorial.pdf

Huysamen, G. K. (2006). Coefficient alpha: Unnecessarily ambiguous; Unduly ubiquitous. Journal of Industrial Psychology, 32, 34—40.

Revelle, W. (2018). psych: Procedures for psychological, psychometric, and personality research. Retrieved at http://personality-project.org/r/psych/psych-manual.pdf

Revelle, W., & Zinbarg, R. E. (2009). Coefficients alpha, beta, omega, and the glb: Comments on Sijtsma. Psychometrika, 74(1), 145—154.

Sijtsma, K. (2009). On the use, the misuse, and the very limited usefulness of Cronbach's alpha. Psychometrika, 74, 107—120.