“Refining and Validating Paul Nation’sVocabulary Size Test for TOEFL Candidates InPakistan: An Item Discrimination and Predictive Validity Studyvocabulary Size Test”. Linguistic Forum – A Journal of Linguistics 7, no. 2 (December 6, 2025): 1–30. Accessed July 27, 2026. http://linguisticforum.com/index.php/ling/article/view/281.