1. Andrich, D. (1978). Rating formulation for ordered response category. Psychometrika, 43(4), 561–573.
2. Bond, T. G., & Fox, C. M. (2012). Applying the Rasch Model: Fundamental measurement in the human sciences (2nd ed.). New York: Routledge.
3. Bradley, K., Peabody, M., Akers, K., & Knutson, N. (2015). Rating scales in survey research: Using the Rasch model to illustrate the middle category measurement flaw. Survey Practice, 8(2). Retrieved from
http://www.surveypractice.org/index.php/SurveyPractice/article/view/266
.
4. Darby, J. A. (2008). Course evaluations: A tendency to respond ‘favourably’ on scales? Quality Assurance in Education, 16, 7–18.
5. Embretson, S. A., & Reise, S. P. (2000). Item response theory for psychologists. Mahwah, NJ: Lawrence Erlbaum Associates.