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INDONESIAN JOURNAL OF APPLIED LINGUISTICS
Abstract
In the area of writing, research has yet to explore EFL learners’ ability to use varied vocabulary.
Although vocabulary teaching has enriched learners’ knowledge of lexical items, whether they can
use the words they have learned remains to be seen. It is important, therefore, to investigate their
lexical richness in their academic writing. Lexical richness, defined as the presence of different
words in a text, is commonly measured through type-token ratio (TTR). The present study set out to
identify the lexical richness of senior students by comparing them to academic papers written by their
lecturers. There are four objectives: (1) to determine the difference between the type-token ratio
(TTR) in students’ essays and that in their lecturers’ essays; (2) to determine the difference between
the use of 2000-word level (henceforth K2) in students’ essays and that in their lecturers’ essays; (3)
to determine the difference between the use of academic words in students’ essays and that in their
lecturers’ essays; (4) to determine the difference between the students’ essays and their lecturers’ in
terms of the use of words other than the 2000-word level and the academic words (designated “offlist
words”). The essays written by the respondents were submitted to a website for vocabulary
profiling (http://www.lextutor/ca/vp). This analysis shows that the lecturers fare better in terms of
TTR and academic words, but write slightly fewer 2000-word level and off-list words than their
students. While the differences in TTR and academic words are significant, the differences in the use
of 2000-word level and off-list are not significant. The subsequent discussion addresses possible
causes of these differences, and offers some implications for the teaching of vocabulary and writing.
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