| Acknowledgement | 第1-7页 |
| Abstract | 第7-9页 |
| 摘要 | 第9-11页 |
| List of Figure and Tables | 第11-13页 |
| List of Abbreviationsxi | 第13-14页 |
| Part One Introduction | 第14-28页 |
| 1．1． Purpose of choosing this topic | 第14-15页 |
| 1．2． Three versions of working definition of lexical competence | 第15-17页 |
| 1．3． Definition of breadth and depth of vocabulary knowledge | 第17-19页 |
| 1．4． Measurement issues | 第19-28页 |
| 1．4．1． Breadth measures | 第19-24页 |
| 1．4．1．1． Ways of selecting a sample of words | 第19-21页 |
| 1．4．1．2． Four sorts of testformats | 第21-24页 |
| 1．4．2． Assessment of depth of vocabulary knowledge | 第24-28页 |
| 1．4．2．1． Developmental approach | 第24-26页 |
| 1．4．2．2． Dimensional approach | 第26-28页 |
| Part Two Literature Review | 第28-34页 |
| 2．1． Previous research on vocabulary knowledge | 第28-30页 |
| 2．1．1． Research on breadth of vocabulary knowledge | 第28页 |
| 2．1．2． Research on depth of vocabulary knowledge | 第28-30页 |
| 2．2． Previous research on the relationship between breadth and depth of vocabulary knowledge | 第30-31页 |
| 2．3． Previousresearchontherelationshipbetweenvocabulary knowledge and reading comprehension | 第31-34页 |
| Part Three Theoretical Bases of the Present Research | 第34-42页 |
| 3．1． The role of vocabulary knowledge in reading comprehension | 第34-39页 |
| 3．1．1． Four perspectives on the vocabulary-reading connection | 第34-38页 |
| 3．1．1．1． Instrumentalist hypothesis | 第34-35页 |
| 3．1．1．2． Generalaptitude hypothesis | 第35页 |
| 3．1．1．3． General knowledge hypothesis | 第35-37页 |
| 3．1．1．4． Speed-of-access hypothesis | 第37-38页 |
| 3．1．2． Summary | 第38-39页 |
| 3．2． Adams'model of the reading process | 第39-42页 |
| Part Four The Present Study | 第42-52页 |
| 4．1． Introduction | 第42-44页 |
| 4．1．1． Purpose | 第42页 |
| 4．1．2． Model adopted in the presentstudy | 第42-43页 |
| 4．1．3． Hypotheses | 第43-44页 |
| 4．2． Subjects | 第44页 |
| 4．3． Instruments | 第44-49页 |
| 4．3．1． Background questionnaire | 第44-45页 |
| 4．3．2． Vocabulary size test | 第45-46页 |
| 4．3．3． Depth-of-vocabulary-knowledge test | 第46-47页 |
| 4．3．4． Morphological knowledge test | 第47-48页 |
| 4．3．5． Reading comprehension tests | 第48-49页 |
| 4．4． Procedures and analyses | 第49-52页 |
| 4．4．1． Apilotstudy | 第49-51页 |
| 4．4．1．1． Validity and reliability of the instruments | 第49页 |
| 4．4．1．2． Correlati on samong the VS,DVK,MKandRC | 第49-50页 |
| 4．4．1．3． Summary of the pilot study | 第50-51页 |
| 4．4．2． Procedures for the for maldata collection | 第51页 |
| 4．4．3． Techniques for the statistic alanalyses | 第51-52页 |
| Part Five Results and Discussion | 第52-61页 |
| 5．1． Results | 第52-58页 |
| 5．1．1． Means,t-tests,andreliabilities | 第52-53页 |
| 5．1．2． Intercorrelations | 第53-54页 |
| 5．1．3． Multiple regression | 第54-57页 |
| 5．1．4． Vocabulary difficulty in reading comprehension | 第57-58页 |
| 5．2． Discussion | 第58-61页 |
| Part Six Conclusion | 第61-64页 |
| 6．1． Implications for language teaching | 第61-62页 |
| 6．2． Limitations and further suggestions | 第62-64页 |
| 6．2．1． Relationship between vocabulary knowledge and other language skills | 第62-63页 |
| 6．2．2． Population representation | 第63页 |
| 6．2．3． Directions for future research | 第63-64页 |
| Bibliography | 第64-72页 |
| Appendices | 第72-80页 |
| Appendix 1 Background Questionnaire | 第72页 |
| Appendix 2 Sample Vocabulary Size Test | 第72-75页 |
| Appendix 3 Sample Depth-of-vocabulary-knowledge Test | 第75-76页 |
| Appendix 4 Morphological Knowledge Test | 第76-77页 |
| Appendix 5 Raw Data from the Research | 第77-80页 |
