The main aim of this book is to open up new perspectives in the study of language proficiency by bringing together current research from different fields in psychology and in linguistics. The book covers both proficiency in the first language and multilingual proficiency.

1. Preface; 2. Introduction; 3. 1. Modeling and assessing language proficiency (by Jong, John H.A.L. de); 4. Section 1. First Language Proficiency; 5. 2. The construct of grammar in early language development (by Kuiken, Folkert); 6. 3. Dimensons in grammatical proficiency (by Bon, Wim H.J. van); 7. 4. Monitoring reading and spelling achievement (by Mommers, Martin J.C.); 8. 5. Speech activity theory and reading comprehension assessment (by Bol, Eduard); 9. 6. Assessment of reading disabilities (by Leij, Aryan van der); 10. 7. Information analysis in written discourse (by Wijk, Carel van); 11. 8. Large scale writing assessment (by Blok, Henk); 12. Section 2: Multilingual Proficiency; 13. 9. Differential item functioning (by Kok, Frank); 14. 10. Assessment of bilingual proficiency (by Verhoeven, Ludo); 15. 11. Self-assessment of minority language proficiency (by Bot, Kees de); 16. 12. Exploring the second language learner lexicon (by Vermeer, Anne); 17. 13. Modeling communicative second language competence (by Verhoeven, Ludo); 18. 14. Modeling and assessing foreign language loss (by Schils, Erik); 19. 15. Dimensions in oral foreign language proficiency (by Jong, John H.A.L. de); 20. Subject index; 21. List of contributors