37. Ham, E. H. (July, 2025). Evaluating LLM-based automated scoring and human expert scoring in undergraduate essay tests. Presented at the 2025 International Conference on Education Research. Seoul.

36. Lee, S. & Ham, E. H. (May, 2025). The role of presence in changes in student basic psychological needs in online learning. Presented at the 2025 EdMedia+Innovative Summit. Barcelona, Spain.

35. Kim, Y., & Ham, E. H. (April, 2025). Application of cross-classified item response theory model to human ratings in longitudinal data. Presented at the 2025 National Council on Measurement in Education. Denver, CO.

34. Ham, E. H. (September, 2024). Assessing GPT-based automated scoring quality in scenario-based assessments: exploring different prompting strategies. Presented at the 9th Conference of the International Association for Computerized Adaptive Testing. Seoul.

33. Ham, E. H. (April, 2024). Comparing measurement properties of GPT and human scoring in student constructed responses. Presented at the 2024 National Council on Measurement in Education. Philadelphia, PA.

32. Ham, E. H., & Moon, J. (March, 2024). Effects of A metaverse-based learning activity on elementary students’ enjoyment and information retention. Presented at the 2024 Society for Information Technology & Teacher Education. Las Vegas, NV.

31. Lee, S., Ham, E. H., & Park, S. (July, 2023). Does students’ self-regulated learning increase over time in an online course? Presented at the 2023 EdMedia+Innovative Summit. Vienna.

30. Kim, M. & Ham, E. H. (April, 2023). Do classroom and school characteristics matter in teachers’ feedback behavior? an application of random forest. Presented at the 2023 American Educational Research Association Annual Meeting. Chicago, IL. 

29. Ham, E. H., & Yu, Y. (Octorber, 2022). What Text-Mining Analyses Can Tell Us about Undergraduates’ Global Understanding? Presented at the 2022 International Conference of Educational Research. Seoul.

28. Ham, E. H., & Byun, H. J. (July 2022). Does creative problem-solving involve critical thinking? Findings from undergraduate, scenario-based problem-solving tasks. Presented at the 2022 Creativity Conference. Ashland, OR.

27. Shim, W., Ham, E. H., & Park, S. (April 2022). Loosely coupled construct? Uncovering the two dimensions of global competence using performance-based assessment. Presented at the 2022 American Educational Research Association Annual Meeting. San Diego, CA.

26. Ham, E. H.(October 2021). Can we measure student task-engagement using item response time?: focusing on PISA 2015 process data. Presented at the 2021 International Conference of Educational Research, Seoul.

25. Ham, E. H., Kim, Y., & Shin, H. (October 2019). Differential testing engagement on a low-stake test: a multinational examination of response time. Presented at the 2019 International Conference of Educational Research, Seoul.

24. Byun, H. J., & Ham, E. H.(July 2019). The qualitative and quantitative analysis on the effect of learning experience design principles for creative problem-solving. Presented at the 2019 Creativity Conference, Ashland, OR.

23. Shin, H., Ham, E. H., & Kim, Y. (April 2019). Response time and achievement: does spending more time increase test scores? Presented at the 2019 National Council on Measurement in Education. Toronto, Canada.

22. Choi, W. & Ham, E. H.(April 2018). Are the effect of the free semester sustainable? Longitudinal evidence on student well-being and career maturity in South Korea. Presented at the 2018 American Educational Research Association Annual Meeting. New York, NY. 

21. Ham, E. H.(October 2017). Do students’ perception of errors affect their attitudes towards assessment? The mediation effect of achievement goals. Presented at the 2017 International Conference of Educational Research, Seoul.

20. Ham, E. H., & Paik, S. (April 2015). Does school experience matter for students’ growth in civic engagement? Presented at the 2015 Annual Meeting of American Educational Research Association, Chicago, IL. 

19. Ham, E. H., Yang, R., Roberts, D. R., & Burrus, J. (August 2014). An application of Anchoring Vignettes for improving comparability of student self-reported teamwork scores. Presented at the 122nd American Psychological Association Annual Convention, Washington, DC.

18. Ham, E. H., & Reckase, M. (April 2014). Comparisons between Educator Performance Function-based and Education Production Function-based Teacher Effect Estimations. Presented at the 2014 Annual Meeting of the National Council of Measurement in Education, Philadelphia, PA.

17. Guarino C., Ham, E. H., Reckase, M., Stacy, B., & Wooldridge, J. (January 2014). Sending teacher value-added into tailspin: A simulation study of measurement error and nonrandom sorting. Presented at the American Economic Association Annual Meeting, Philadelphia, PA. 

16. Lee, H., Ham, E. H., & Lee, Y. (November, 2013). How parental supporting styles affect student longitudinal changes in academic motivations? Paper presented at the Korean Education Longitudinal Study 7th Annual Conference, Seoul, Korea.

15. Reckase, M. D., & Ham, E. H.(November 2013). Teacher evaluation: why is a simple concept so complex? Invited presentation at the First Five Years of Mathematics Teaching, Istanbul, Turkey.

14. Guarino C., Ham, E. H., Reckase, M., Stacy, B., & Wooldridge, J. (March 2013). Classical solutions to new problems: exploring measurement error corrections in the context of teacher value-added. Presented at the 38th Annual Association for Education Finance and Policy Conference. New Orleans, LA. 

13. Ham, E. H., & Jang, H. (August 2013). An examination of the psychometric properties of context-specific measures of motivational constructs. Presented at the 121st American Psychological Association Annual Convention, Honolulu, Hawaii.

12. Guarino C., Reckase, M., Wooldridge, J., Ham, E. H., Maxfield, M., Stacy, B., Thompson, P., & Vosters, K. (November 2012). The state of the art in the research on value-added models of teacher performance: taking stock of what we know and don’t know. Presented at the 2012 Association for Public Policy Analysis and Management Fall Research Conference, Baltimore, MD. 

11. Ham, E. H.(August 2012). Longitudinal coupling of mathematics achievement, self-efficacy, and interest in elementary school years. Presented at the 120th American Psychological Association Annual Convention, Orlando, FL.

10. Hwang, M. H., Kim, Y., Ham, E. H., & Oh, S. (August 2012). Beyond lower motivation, lower self-control, and ineffective strategies for underachieving students. Poster presented at the 120th American Psychological Association Annual Convention, Orlando, FL.

9. Reckase, M., Ham, E. H., Guarino C., & Wooldridge, J. (April 2012). What can be learned from simulation studies of value-added models? Presented at the 2012 Annual Meeting of the National Council of Measurement in Education, Vancouver, BC.

8. Ham, E. H., Reckase, M., Guarino C., & Wooldridge, J. (April 2012). Sensitivity of value-added estimation to test and scaling. Presented at the 2012 Annual Meeting of American Educational Research Association, Vancouver, BC.

7. Ham, E. H., & Jang, H. (August 2011). Effects of item context on measuring student’s attitude toward science across countries. Presented at the 119th American Psychological Association Annual Convention, Washington, DC.

6. Hwang, M. H., Kim, Y., Oh, S., Ham, E. H., Lim, H. J. (August 2011). Development of Korean Academic Underachievement Type Inventory. Presented at the 119th American Psychological Association Annual Convention, Washington, DC.

5. Reckase, M., Ham, E. H., Guarino, C., Woodridge, J. (November 2010). The match between value-added models and vertically scaled test results. Invited presentation at the 55th Annual Meeting of Florida Educational Research Association, Orlando, FL.

4. Kim, J., Park, S., Sung K., Ham, E. H., & Min, B. (April 2010). An international comparative study on the relationship between private tutoring and achievement – focusing on Finland, Japan, and South Korea. Presented at the 2010 Annual Meeting of American Educational Research Association, New Orleans, LA.

3. Park, S., Kim, J., Sung K., Min, B., & Ham, E. H. (April 2010). Pathway to Excellence and Equity: comparison between Finnish and Korean education. Presented at the 2010 Annual Meeting of American Educational Research Association, New Orleans, LA.

2. Baek, S., Ham, E. H. (October 2007). An evaluation study on the educational value of teaching practicum in secondary school. Presented at the 8th International Conference on Education Research, Seoul, Korea.

1. Baek, S., Hwang, E. H., Ham, E. H., Lee, J. Y., Yu, Y., Kil, H., & Shin, H. J., (October 2007). A study on the development of the teaching competence scale for secondary school teachers. Presented at the 8th International Conference on Education Research, Seoul, Korea.