Dr. Barbara Japelj Pavešić is a researcher at the Educational Research Institute in Ljubljana, Slovenia. With a background in mathematics and statistics, her area of research is the measurement of mathematics and science knowledge and statistical modeling of research data, especially with relatively new methods of symbolic data analyses and data mining. Her main research focus is rising of the national mathematics standards and opportunities to learn mathematics in schools. She has been the National Research Coordinator for all cycles of TIMSS and TIMSS Advanced and TALIS 2018 in Slovenia. She is the author of national TIMSS and TALIS reports, articles presenting results of secondary analyses of TIMSS and other educational data, involved in national projects and coauthor of textbooks for mathematics for grade 4 to 6. Dr. Paulína Koršňáková as Senior Research and Liaison Adviser for IEA, is responsible for supporting and developing existing memberships and institutional partnerships within IEA’s mission of researching education to improve learning. Prior to her various assignments at IEA since 2010, she led implementation and reporting for various international large-scale assessments at a national level in the Slovak Republic. Dr Koršňáková is an experienced teacher, lecturer and researcher and represents Slovakia on the European Educational Research Association (EERA) Council.Dr Sabine Meinck works for the IEA in Hamburg, Germany, being head of both its Research and Analysis Unit and Sampling Unit. Since 2006, she has been involved with the sampling, weighting, variance estimation, and analysis of nearly all contemporary large-scale assessments in education. Dr Meinck provides guidance and support for research activities within the IEA, and is associated editor of the Springer journal "Large-scale Assessments in Education". Her main research interest lies with the science of cross-national large-scale assessments, and the methodological challenges of complex survey data.
