Frontmatter -- Contents -- Contributors -- 1. The Detection-Based Approach: An Overview -- 2. Detecting L2 Writers' L1s on the Basis of Their Lexical Styles -- 3. Exploring the Role of n-Grams in L1 Identification -- 4. Detecting the First Language of Second Language Writers Using Automated Indices of Cohesion, Lexical Sophistication, Syntactic Complexity and Conceptual Knowledge -- 5. Error Patterns and Automatic L1 Identification -- 6. The Comparative and Combined Contributions of n-Grams, Coh-Metrix Indices and Error Types in the L1 Classification of Learner Texts -- 7. Detection-Based Approaches: Methods, Theories and Applications