1. Inquiries in linguistic development: Studies in honor of Lydia White (by Slabakova, Roumyana); 2. I. Learnability and parameter setting; 3. 'Passive' unaccusative errors in L2 English revisited (by Hirakawa, Makiko); 4. Manner-of-motion verbs with locational/directional PPs in L2 English and Japanese (by Inagaki, Shunji); 5. A semantic parameter with a syntactic trigger in the L2 acquisition of Italian (by Slabakova, Roumyana); 6. Investigating the L2 initial state: Additional evidence from the production and comprehension of Afrikaans-speaking learners of German (by Gruter, Theres); 7. L1 phonotactic knowledge and the L2 acquisition of alternations (by Pater, Joe); 8. II. Variability; 9. Morphological variability in the development of L2 French morphosyntax: The issues of impairment and L1 influence (by Prevost, Philippe); 10. Full transfer vs. partial transfer in L2 and L3 acquisition (by Leung, Yan-kit Ingrid); 11. A representational licensing-based account of asymmetries in the L2 acquisition of place (by Steele, Jeffrey); 12. Processing reduced relative versus main verb ambiguity in English as a Second Language: A replication study with working memory (by Juffs, Alan); 13. Formalism and functionalism working together?: Exploring roles for complementary contributions in the domain of child null arguments (by Allen, Shanley E.M.); 14. III. Incomplete ultimate attainment; 15. L2 acquisition of pragmatic and syntactic constraints in the use of overt and null subject pronouns (by Gurel, Ayse); 16. L2 end state grammars and incomplete acquisition of Spanish CLLD constructions (by Valenzuela, Elena); 17. Knowledge of clitic doubling in Spanish: Evidence against pattern learning (by Bruhn de Garavito, Joyce); 18. Incomplete acquisition as a feature of bilingual and L2 grammars (by Montrul, Silvina A.); 19. Index