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.
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 the Journal of 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.