Freihat, Aiman. “The Effect of the Number of Response Categories of Likert Anxiety Trait Scale on Its Psychometric Characteristics”. Psychological& Educational Studies Review 12, no. 2 (June 30, 2019): 331-349. Accessed July 25, 2026. https://journals.univ-ouargla.dz/index.php/PES/article/view/5086.