Sopa, Pramote, Prakittiya Tuksino, and Pattrawadee Makmee. 2023. “The Appropriate Sample Size for Test Length on Estimating Item Parameters in Item Response Theory”. Journal of Research Methodology 36 (2). Bangkok, Thailand:144-63. https://so12.tci-thaijo.org/index.php/jrm/article/view/550.