Jasone Cenoz is Associate Professor of English Linguistics at the University of the Basque Country (Spain). Her publications include Beyond Bilingualism: Multilingualism and Multilingual Education, co-edited with Fred Genesee (Multilingual Matters 1998).Ulrike Jessner is Associate Professor of English Linguistics at the University of Innsbruck (Austria). Her publications include A Dynamic Model of Multilingualism: Changing Perspectives in Psycholinguistics, co-authored with Philip Herdina (Multilingual Matters, forthcoming in 2000).