1. Adams, R. J., Wilson, M. R., & Wang, W.-C. (1997). The multidimensional random coefficients multinomial logit model. Applied Psychological Measurement, 21, 1–23.
2. Al-Mutawah, M. A., & Fateel, M. J. (2018). Students' Achievement in Math and Science: How Grit and Attitudes Influence?. International Education Studies, 11(2), 97-105.
3. Andrich, D. (1978). A rating formulation for ordered response categories. Psychometrika, 43, 561–573.
4. Duckworth, A. L. (2016). Grit: The Power of Passion and Perseverance. New York, NY: Scribner.
5. Duckworth, A. L., & Gross, J. J. (2014). Self-control and grit: Related but separable determinants of success. Current Directions in Psychological Science, 23, 319-325.
6. Duckworth, A. L., & Quinn, P. D. (2009). Development and validation of the Short Grit Scale (GRIT–S). Journal of Personality Assessment, 91, 166-174.
7. Duckworth, A. L., Peterson, C., Matthews, M. D., & Kelly, D. R. (2007). Grit: perseverance and passion for long-term goals. Journal of Personality and Social Psychology, 92, 1087-1101.
8. George, D., & Mallery, P. (2003). SPSS for Windows step by step: A simple guide and reference. 11.0 update (4th ed.). Boston: Allyn & Bacon
9. Jöreskog, K. G., & Goldberger, A. S. (1975). Estimation of a model with multiple indicators and multiple causes of a single latent variable. Journal of the American Statistical Association, 10, 631-639.
10. Osterlind, S. J. & Everson, H. T. (2009). Differential Item Functioning. Thousand Oaks, CA: Sage Publishing.
11. Rimfeld, K., Kovas, Y., Dale, P. S., & Plomin, R. (2016). True grit and genetics: Predicting academic achievement from personality. Journal of Personality and Social Psychology, 111, 780-789.
12. Robertson-Kraft, C., & Duckworth, A. L. (2014). True grit: Trait-level perseverance and passion for long-term goals predicts effectiveness and retention among novice teachers. Teachers College Record (1970), 116(3).
13. Schmidt, F. T., Fleckenstein, J., Retelsdorf, J., Eskreis-Winkler, L., & Möller, J. (2019). Measuring grit: A German validation and a domain-specific approach to grit. European Journal of Psychological Assessment, 35, 436-447.
14. Schmitt, T. A., & Sass, D. A. (2011). Rotation criteria and hypothesis testing for exploratory factor analysis: Implications for factor pattern loadings and interfactor correlations. Educational and Psychological Measurement, 71, 95-113.
15. Shrestha, N. (2021). Factor analysis as a tool for survey analysis. American Journal of Applied Mathematics and Statistics, 9, 4-11.
16. Wang, W. C. & Shih, C. L. (2010). MIMIC Methods for Assessing Differential Item Functioning in Polytomous Items. Applied Psychological Measurement, 34, 166-180.
17. Wang, W. C., Chen, P. H., & Cheng, Y. Y. (2004). Improving measurement precision of test batteries using multidimensional item response models. Psychological Methods, 9, 116-136.
18. Wang, W. C., Shih, C. L., & Sun, G. W. (2012). The DIF-free-then-DIF strategy for the assessment of differential item functioning. Educational and Psychological Measurement, 72, 687-708.
19. Wilson, M. (2005). Constructing measures: An item response modeling approach. Mahwah, NJ: Erlbaum Associates.
20. Wright, B. D. & Stone, M. H. (1979). Best Test Design. Chicago, ILL: MESA Press.
21. Wu, M. L., Adams, R. J., &Wilson, M. R. (1998). ConQuest [Computer software and manual]. Camberwell, Victoria, Australia: Australian Council for Educational Research.