Frontmatter -- Contents -- Acknowledgments -- Introduction -- Part 1: Encountering Comprehensible Input: Conceptual Foundation -- 1. Comprehensible Input Defi ned -- 2. Theoretical Foundation of Input and Comprehensibility -- 3. Linguistic Perspectives on Input -- Part 2: Comprehensible Input: Second Language Acquisition -- 4. Input in Cognitive Processingoriented Theories -- 5. Input in Learner and Interaction-centered Theories -- 6. Input in Socially-oriented Theories -- 7. Input in Alternative SLA Theories -- Part 3: Comprehensibility-related Factors in L2 Teaching and Assessment -- 8. Input-related Factors in L2 Teaching -- 9. Learner-related Factors -- 10. Culture and Context-related Factors -- 11. Discourse, Interaction and Modification-related Factors -- 12. Modifications in Assessment related Factors and CI -- 13. Conclusions -- References -- Index