Kavaliauskas M. STATISTICAL VALIDATION OF AN ENGLISH FOR SPECIFIC PURPOSES ACHIEVEMENT TEST USING CLASSICAL TEST THEORY: A CASE STUDY OF A HIGHER EDUCATION INSTITUTION. PSTP [Internet]. 2026 Jun. 2 [cited 2026 Jun. 13];30(1):4–12. Available from: https://ojs.svako.lt/PSTP/article/view/436