Adedoyin, O. ., and T. . Mokobi. “Using IRT Psychometric Analysis in Examining The Quality of Junior Certificate Mathematics Multiple Choice Examination Test Items”. International Journal of Asian Social Science, vol. 3, no. 4, Apr. 2013, pp. 992-1011, https://archive.aessweb.com/index.php/5007/article/view/2471.