Part A1: Defining the Field 2. Dynamic Systems Theory 3. Historical Perspectives 4. The Multilingual Mind 5. The Developing System 6. Learner's Characteristics 7. The Role of Instruction 8. The Dynamics of SLA Extended Part B1: Multi-Competence and the Learning of Many Languages 2. What Counts in the Acquisition and Attrition of Numeral Classsifiers 3. Brain Imaging of Language Plasticity in Adopted Adults: Can a Second Language Replace the First? 4. Chaos/Complexity Science and Second Language Acquisition 5. Historical Perspectives Extended 6. The Significance of Learners' Errors 7. What Fruit Can Tell us About Lexico-Semantic Transfer: A Non-Structural Dimension to Learner's Perceptions of Linguistic Relations 8. Krashen's Monitor and Occam's Razor 9. The Multilingual Mind 10. Category Interference in Translation and Picture Naming 11. The Bilingual Lexicon 12. Making Sense of Polysemous Words 13. Bilingual Speech: From Concepts to Articulation 14. The Developing System Extended 15. The Role of Input and Interaction in Second Language Acquisition 16. Problems in Output and the Cognitive Processes they Generate: A Step Towards Second Language Learning 17. Learners' Characteristics Extended 18. Ultimate Attainment in £2 Pronunciation: The Case of Very Advanced Late £2 Learners 19. Towards a Full Model of Second Language Learning: An Empirical Investigation 20. Foreign Language Learning Differences: Affective or Native Aptitude Differences? 21. The Role of Instruction Extended 22. Form Focussed Instruction and Second Langauge Acquisition: A Review of Classroom and Laboratory Research 23. The Effects of Inferrring, Verifying and Memorising on the Rentention of £2 Word Meanings: An Experimental Comparison of the Meaning-Inferred Method and the Meaning Given Method 24. Input, Interaction and Second Language Development: An Empirical Study of Question Formation in ESL Part C1: Dynamic Systems Theory Explored 2. Historical Perspectives Explored 3. The Multilingual Mind Explored 4. The Developing System Explored, Second Language Acquisition and the Competition Model 5. Learner's Characteristics Explored 6. The Role of Instruction Explored