Vocabulary Knowledge -- Editorial page -- Title page -- LCC data -- Table of contents -- Bio data of authors -- Introduction -- References -- Chapter 1. Defining and measuring lexical diversity -- 1. Introduction -- 2. Background and terminology -- 3. Identifying the construct -- 4. Defining the construct -- 5. Operationalizing the construct and calibrating the measures -- 6. Conclusions -- Acknowledgements -- References -- Appendix A -- Appendix B -- Chapter 2. From intrinsic to extrinsic issues of lexical diversity assessment -- Introduction -- Intrinsic issues of lexical diversity assessment -- Extrinsic issues of lexical diversity assessment -- Developments in addressing intrinsic issues of lexical diversity assessment The Early Days -- Unanswered questions -- MTLD -- Validity -- Convergent validity -- Divergent validity -- Internal validity -- Incremental validity -- Summary -- Addressing extrinsic issues of lexical diversity assessment -- Design -- Lexical diversity approaches -- Material -- Procedure -- Correlation analysis -- Analysis of variance and covariance for nine groupings -- Analysis of variance and covariance for three groupings -- Analysis of variance and covariance for two groupings -- Three groups of ninth graders -- Three groups of finns by grade -- Summary -- Discussion -- Acknowledgements -- References -- Chapter 3. Measuring lexical diversity among L2 learners of French -- Introduction -- 2. Method -- 3. Results -- 3.1 The effect of lemmatization -- 3.2 Predictive validity -- 3.3 Internal validity: Dependence on text length -- 3.4 Convergent, divergent and incremental validity -- 4. Discussion and conclusion -- References -- Chapter 4. Validating lexical measures using human scores of lexical proficiency -- Introduction -- Validity -- Validity studies of automated lexical indices -- Methods -- Corpus collection.

Survey instrument -- Human ratings -- Variable selection -- Statistical analysis -- Results -- Pearson correlations -- Semantic co-referentiality -- Collocations scores -- Sense relation scores -- Sense frequency scores -- Frequency scores -- Lexical diversity scores -- Multiple regression analysis -- Discussion -- Conclusion -- Acknowledgments -- References -- Appendix -- Holistic rating form -- Chapter 5. Computer simulations of MRC Psycholinguistic Database word properties -- Introduction -- Word concreteness -- Word familiarity -- Word imageability -- Method and hypotheses -- Corpus -- Lexical variables -- Results -- Pearson correlations training set -- Multiple regression training set -- Word concreteness -- Word familiarity -- Word imageability -- Discussion -- Conclusion -- Acknowledgements -- References -- Chapter 6. Modelling L2 vocabulary learning -- Modelling L2 vocabulary learning -- Background -- Model assumptions -- A Model of vocabulary acquisition -- Modelling text production -- Testing the model on ESL texts -- Procedure -- Results and consequences -- Discussion -- Conclusion -- Author note -- Appendix A -- References -- Chapter 7. Vocabulary acquisition and the learning curve -- 1. Introduction -- 2. Language learning curves -- 2.1 An overview of different learning curves -- 2.2 Learning curves and the Power Law -- 3. Lexical richness and its measurement -- 4. Hypotheses -- 5. Methodology -- 5.1 Participants -- 5. 2 Measures and procedure -- 6. Results -- 6.1 Text length -- 6.2 Measures of lexical richness -- 6.3 Ratings by teachers based on IELTS band descriptors -- 6.4 Linear fit lines and Loess curves -- 6.5 Fit lines -- 6.6 The latent growth curve -- 7. Conclusions -- References -- Index.