1. How to Trace the Growth in Learners’ Active Vocabulary? -- a corpus based study Agnieszka Leńko-Szymańska TEFL Unit University of Łódź

2. Dimensions of learners’ vocabulary knowledge zpassive knowledge zactive knowledge in an elicitation task zactive knowledge in a free production task

3. Test measuring receptive vocabulary size zVocabulary Levels Test (Nation 1983, 1990) zEurocentres Vocabulary Size Test (Meara & Jones 1990)

4. Test measuring productive vocabulary size zVocabulary Levels Test (active version) (Laufer and Nation 1995)

5. Some measures of lexical richness zLexical Density zLexical Originality zLexical Variation zLexical Sophistication zOthers less frequently employed tests: semantic variation, lexical quality, T-unit length, error free T-unit length (Laufer and Nation 1995, Meunier 1998)

6. Reasearch aims zto compare the validity of two measures of lexical richness: ylexical variation ylexical sophistication zto trace and analyse the growth of receptive and productive vocabulary in advanced learners of English at two different proficiency levels

7. Tools zVocabulary Levels Test (receptive version) zWordsmith zVocabProfile

8. Vocabulary Levels Test zoriginal zprivate__________complete zroyal__________first zslow__________not public zsorry ztotal

9. Lexical variation measure zType/Token Ratios yType/Token Ratio yStandardised Type/Token Ratio (300 words) yStandardised Type/Token Ratio (150 words) yStandardised Type/Token Ratio (450 words) -- YEAR IV only

10. Lexical sophistication measure zLexical s ophistication: Lexical Frequency Profile y1000 y2000 yUWL (Xue & Nation 1984) ynot in the lists (> 2000)

11. Receptive vocabulary size YEAR I & YEAR IV zYEAR I 100 students range 5455 -- 9646 word families mean = 8236,1 SD = 936,136 zYEAR II 67 students range 7601 -- 10000 word families mean = 9218,21 SD = 665,933

12. Comparison of receptive vocab. YEAR I & YEAR IV

13. zmean Year I < mean Year IV zt = -7,41823 zP-value = 1,15253E-7

14. Essay statistics YEAR I & YEAR IV zYEAR I 100 essays range 302 -- 659 tokens mean = 486,75 SD = 64,8036 zYEAR II 67 essays range 466 -- 1030 tokens mean = 714,343 SD = 124,573

15. Comparison of Type/Token Ratios YEAR I & YEAR IV

16. Lexical Frequency Profile YEAR I

17. Lexical Frequency Profile YEAR IV

18. Comparison of LFP levels YEAR I & YEAR IV

20. Comparison of Type/Token Ratios and receptive vocabulary size

21. Comparison of LFP levels and receptive vocabulary size