John De Jong

John H.A.L. de Jong is Professor Emeritus of Language Testing at VU University Amsterdam and runs a consultancy business ‘Language Testing Services’ to provide consultancy on language testing and educational measurement. Among his clients: language testing companies, national ministries of education, the World Bank, the OECD and the European Union. At Pearson (2006 – 2016) he developed Pearson Test of English Academic and the Global Scale of English and acted as Programme Director for developing the Frameworks for PISA 2015, 2018 and PISA for Development.

John has 45 years’ experience in language testing. He graduated in General Linguistics, French and English languages from Leiden University and obtained a Ph.D. in Educational Measurement from Twente University. He has published widely on language assessment and educational measurement. He has specialised in empirical scaling and the development of internationally standardised reporting scales of language proficiency. He was involved in developing the Common European Framework for Languages.