Editor-in-Chief:

Purya Baghaei, Research and Analysis Unit/Sampling Unit, IEA Hamburg, Germany

Editorial Board:

William Boone, Miami University, Ohio, USA 

Karl Bang Christensen, University of Copenhagen, Denmark

Jimmy de la Torre, University of Hong Kong, Hong Kong

Philipp Doebler, Technische Universität Dortmund, Germany

Clemens Draxler, UMIT TIROL - Private University of Health Sciences and Health Technology, Hall in Tyrol, Austria

Hessameddin Ghanbar, Islamic Azad University, Fereshtegaan International Branch, Tehran, Iran 

Svend Kreiner, University of Copenhagen, Denmark

Klaus D. Kubinger, University of Vienna, Austria

Olga Kunina-Habenicht, Technische Universität Dortmund, Germany

Mike Linacre, Research Director, Winsteps.com, Portland, Oregon, USA

Wenchao Ma, University of Minnesota - Twin Cities, USA

Tine Nielsen, UCL University College, Odense, Denmark

Hamdollah Ravand, Vali-e-Asr University of Rafsanjan, Iran

Alexander Robitzsch, IPN–Leibniz Institute for Science and Mathematics Education, Kiel, Germany

Miguel A. Sorrel, Universidad Autónoma de Madrid, Spain

Rolf Strietholt, International Association for the Evaluation of Educational Achievement (IEA) Hamburg, Germany

Agustin Tristan-Lopez, Instituto de Evaluación e Ingeniería Avanzada, San Luis Potosí, Mexico

Steffen Zitzmann, Medical School Hamburg, Germany