1. Fundamental issues in modelling and assessing vocabulary knowledge 2. Lexical profiles, learner aptitude and the construct validity of lexical size tests 3. Learners' response behaviour in yes/no vocabulary tests 4. Validity and threats to validity of vocabulary measures 5. Comparing measures of vocabulary richness 6. Productive vocabulary tests and the search for concurrent validity 7. Exploring measures of vocabulary richness in the semi-spontaneous speech of native and non-native speakers of French 8. Lexical richness and the oral proficiency of Chinese EFL students 9. Implementing Graph Theory approaches to the exploration of density and structure in L1 and L2 word association networks 10. Insights into the structure of L1 and L2 vocabulary networks 11. Assessing vocabulary for the purpose of reading diagnosis 12. Combined methodological approaches to the assessment of vocabulary in oral proficiency interviews 13. Teacher ratings of EFL essays and different aspects of lexical richness