Welcome
Hello! I am a Research Assistant in Educational Measurement and Evaluation at Trakya University, Faculty of Education, and a PhD candidate in the same field at Hacettepe University.
My work mostly includes Monte Carlo simulations to examine factor retention methods' performance with ordinal datasets in psychoeducational contexts (i.e., cross-loadings, hierarchical structures, and missing data) and what these findings imply for researchers and practitioners who need to determine the appropriate number of factors. I also work with large-scale assessment data (PISA, PIRLS, TIMSS, ICILS) on measurement invariance and item-format effects.
This site collects my publications, talks, and the software and teaching materials I share.
Research at a glance
Factor analytic framework
How many factors are there, really? Parallel analysis, EGA, Hull, CD and friends — stress-tested with ordinal, mixed-format and hierarchical data — plus what that structure does to alpha, omega and their relatives.
Mixture modeling
Finite mixture, latent class and factor mixture models to uncover unobserved respondent subgroups and test whether measurement properties hold across them.
Network psychometrics
Psychometric network models as a complementary lens on construct structure, alongside the factor-analytic tradition.
Large-scale assessment
Measurement invariance and item-format effects across countries in PISA, PIRLS, TIMSS and ICILS.
News
- 2026 — Presented two papers at ECER 2026 (Tampere, Finland): person-level covariates and item complexity in PISA 2022 creative thinking tasks (with Emre Güvendir & Meltem Acar-Güvendir), and working for pay and academic achievement, a cross-national PISA 2022 meta-analysis (with Samet Eker).
- 2026 — Structuring psychopathology: A stress-test of factor retention methods in complex hierarchical models (co-author: Abdullah Faruk KILIÇ) accepted in Assessment.
- 2026 — Revisiting the Dimensionality of the Rosenberg Self-Esteem Scale Under Careless Responding (co-author: Assoc. Prof. Gül GÜLER) accepted as an oral presentation IMPS26.
- 2026 — (Mis)Modeling Acquiescence Bias in Latent Mediation Models accepted as a poster presentation IMPS26.
- 2026 — Bridging minds and machines: AI and human rater agreement in educational assessment is out in Education and Information Technologies.
- 2026 — Easing the burden (PISA 2022, teacher self-efficacy) published in the Journal of Teacher Education and Lifelong Learning.
- 2025 — Cross-loadings and factor retention paper accepted in Psihologija.
- 2025 — Virtual poster presented at AERA 2025 (exploratory graph analysis with mixed-format data).
Thanks for stopping by. Corrections and collaboration ideas are always welcome.