Siwon Park

Multilingual higher education leader with over 25 years of experience in English education, psychometrics, and program coordination. Specializes in second language assessment, CEFR-aligned test development, data-driven program evaluation, and faculty leadership. Successfully implemented the Duolingo English Test as a qualification for study-abroad programs and conducted ETS-funded research on TOEFL ITP. Proficient in policy planning, stakeholder engagement, and statistical analysis for learning outcomes.

• Park, S. (2025). The impact of resilience, collaboration, and language learning strategies on L2 oral proficiency development in short-term study-abroad programs. Studies in English Education, 30(1), 59–89.
• Wadden, P., Itoh, T., Park, S., Van Amelsvoort, M., Fukuda, T., Umehara, H., & Lacy, B. (2025). Sharply increasing first-year students' TOEFL score gains by implementing a liberal arts CLIL curriculum: A concluding report on 2021–24 curriculum reform. Juntendo Journal of Global Studies, 10, 19–29.
• Fukuda, T., Park, S., Wadden, P., Van Amelsvoort, M., & Umehara, H. (2025). Investigation into the reliability of the New General Service List Test (NGSLT) and the relationship between NGSLT and TOEFL among Japanese university students. Juntendo Journal of Global Studies, 10, 43–49.
• Park, S., Ueno, S., & Sugita, M. (2024). The impact of resilience and self-regulation on L2 proficiency among ESL learners. International Journal of TESOL Studies, 7(1), 105–125.
• Park, S., & Sugita, M. (2024). The effects of online and onsite study abroad experiences on students’ perceptions of global challenges and decisions on their career pathways. The Journal of Kanda University of International Studies, 36, 163–183.
• Park, S. (2022). Exploring the relationship between L2 learners' critical thinking and self-regulating capacities and English grammar and reading abilities. Studies in Linguistics and Language Teaching, 32, 163–175.
• Park, S., Ito, Y., & Sugita, M. (2021). Effects of test format in assessing L2 vocabulary knowledge and skills. Studies in Linguistics and Language Teaching, 31, 111–124.
• Jackson, D. O., & Park, S. (2020). Self-regulation and personality among L2 writers: Integrating trait, state, and learner perspectives. Journal of Second Language Writing.
• Park, S., Sugita, M., & Inoue, K. (2019). Issues in developing English reading and listening tests based on the CEFR-J scales. Studies in Language Sciences, 25, 57–71.
• Tsuji, R., & Park, S. (2018). The influences of a peer tutoring program on its participants at a Japanese university. The Journal of Kanda University of International Studies, 30, 69–92.
• Park, S. (2017). Testing the comparability of different L2 oral test tasks. Journal of Asia TEFL, 14(4), 717–735.
• Park, S. (2017). The effect of test method on L2 reading and listening performance. Journal of Pan-Pacific Association of Applied Linguistics, 21(1), 45–63.
• Park, S., Ito, Y., Sugita, M., & Tsuji, R. (2016). Comparability of TOEFL ITP and TOEIC IP: Analyzing test materials and scores. Studies in Linguistics and Language Teaching, 27, 59–80.
• Park, S., & Sugita, M. (2016). Learners' perception of task difficulty and actual performance in L2 speaking. The Journal of Kanda University of International Studies, 28, 49–65.
• Park, S. (2015). Development of level-specific test based on the ACTFL reading guidelines: An item response theory approach. The Journal of Kanda University of International Studies, 27, 23–41.

• Psychometric analysis using CTT and IRT
• BILOG-MG, FACETS, Winsteps, SPSS, R, Excel
• TOEFL/TOEIC test design and validation
• AI-driven writing feedback development (MIT)
• Institutional reporting and test score interpretation
• Web-based testing systems and survey tools
• Consulting in research methods and assessment

• Applied Data Science Certificate, in progress, MIT & Great Learning Team