Thailand / Belgium / United States / Iceland / Canada / Australia / Liechtenstein / Botswana / Philippines / Israel / Iran / India / /
Currency
CYP / ESP / /
Facility
SPA HGK.CHI / SPA Mexico Spanish ROM.ROM / SPA Argentina Spanish ALB.ALB / SPA Spain Spanish ITA.ITA Italy Italian FIN.FIN / Aletta Grisay University of Liège / SPA Colombia Spanish BEL.FRE Belgium French CYP.GRE / SPA THA.THA / SPA Argentina Spanish BLZ.ENG Belize English AUS.ENG Australia English CAN.ENG Canada English AUT.GER / SPA Peru Spanish SVK.SVK / SPA Chile Spanish IRN.FAR Iran / United States Christian Monseur University of Liège / /
Organization
International Association for the Evaluation of Educational Achievement / Belgium Eugenio Gonzalez Educational Testing Service / Aletta Grisay University of Liège / OECD PISA / Italian NLD / Russian NLD / Russian Fed / United States Christian Monseur University of Liège / Organisation for Economic Cooperation and Development / Hungarian PER / /
Equivalence of item difficulties across national versions of the PIRLS and PISA reading assessments Aletta Grisay University of Liège, Belgium