Research has consistently shown diversity of vocabulary to be an important indicator of second language (L2) writing development as well as L2 writing performance. These studies underscore the importance of vocabulary to L2 writing. However, they provide little to indicate what kind of vocabulary learners of English may need to know in order to develop writing proficiency. This small-scale pilot study examined the relationships among vocabulary knowledge, vocabulary use, and L2 writing performance. The results suggest that accurate productive knowledge of high-frequency word families was associated with L2 writing performance. However, actual use of high-frequency word families was negatively associated with L2 writing performance. Based on the results, the authors present potential uses of lexical frequency information to help students develop (a) accurate productive knowledge of high-frequency word families and (b) a repertoire of low-frequency word families based on their communicative needs.
Multiple studies on the relationship between lexical diversity and holistic writing quality in a second language (L2) have consistently shown that a greater number of unique lexical items, compared to the total number of words, is associated with better quality writing. The findings of such studies indicate the importance of vocabulary to L2 writing. However, they provide little information in terms of what vocabulary L2 writers need to learn in order to improve their writing. Despite its limited application in the mid to late 1990s, the use of lexical frequency profiles has not been developed as a method for analyzing the vocabulary of L2 writers’ texts and providing insight as to the vocabulary needed for developing L2 writers. This study constructed two lexical frequency profiles of texts written by a homogeneous group of Spanish-speaking learners of English. Multiple regression analyses were conducted to determine the contribution of more and less frequent lexical items to the participants’ holistic scores. The results indicated that word types which occur less frequently in the English language contributed significantly to the participants’ holistic scores, despite the relatively low frequency with which they were used in the participants’ essays. These results suggest not only the utility of lexical frequency profiles in teaching and researching L2 writing, but also that L2 writers may benefit from instruction using frequency information. Pedagogical implications are discussed in terms of how L2 writing instructors can incorporate lexical frequency information into direct vocabulary instruction.
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