TECHNOLOGY-MEDIATED TOEFL PREPARATION: EVALUATING TESTGLIDER APLICATION APLICATION'S CONTRIBUTION TO LISTENING SKILLS, GRAMMATICAL ACCURACY, AND READING COMPREHENSION SKILLS

Abstract

This mixed-methods study investigated the contribution of TestGlider application to TOEFL skill development among 29 seventh-semester English education students at Universitas Muhammadiyah Pringsewu Lampung during the 2024/2025 academic year. Employing an explanatory sequential design, the research utilized pretest-posttest measurements, questionnaires, and semi-structured interviews to examine listening skills, grammatical accuracy, and reading comprehension development. Results demonstrated statistically significant improvements across all three skill areas (p < 0.001) with large effect sizes: listening (d = 1.73), grammar (d = 2.09), and reading (d = 1.83). Students reported positive perceptions regarding platform usability, authentic materials, immediate feedback, and adaptive learning features. Qualitative findings revealed that TestGlider effectively enhanced TOEFL preparation through interactive exercises, progress tracking, and gamified elements that increased motivation and engagement. However, challenges included occasional technical difficulties and the need for initial training. The study provides empirical evidence supporting technology-mediated TOEFL preparation in Indonesian higher education contexts and offers practical implications for curriculum developers and educators seeking to integrate digital platforms into language assessment preparation courses.