第二言語学習者の縦断的データを用いた中間言語分析

―英語日記コーパス調査―

抄録

There have been many cross-sectional studies comparing second language learners at different proficiency levels to investigate changes in their interlanguage. However, longitudinal studies are necessary to observe continuous changes in the same second language learners. This study used longitudinal data to reveal how the writing of the same Japanese learners of English changed over time. Specifically, the English diaries of three Japanese learners of English were examined over a period of 6 to 9 months. The results showed that the frequency of prepositions and determiners increased with the time the three learners had kept the diaries. Conversely, in some diaries, the frequency of adjectives and particles tended to increase over time, whereas it decreased in others. These findings indicate that longitudinal studies of an interlanguage can reveal both common and individual changes in second language learners.