The Correlation between Students' Vocabulary Mastery and Their Ability in Writing

Writing is a complex skill to express ideas or feelings in a clear, correct and comprehensible way. In order to be able to write or to make a composition clearly and correctly in English, the students have to be supported by the mastery of two important subsystems or components of language, namely vocabulary and grammar. Although they have mastered the basic grammar, they still cannot convey their ideas without mastering the knowledge of words and their meanings. This research aims to investigate the correlation of students’ vocabulary mastery and their ability in writing paragraph. This uses quantitative research which uses Pearson Product Moment Correlation to analysis the data. The population and sample are from the students of English Islamic Studies course in second semester academic year 2018/2019 and it consists of 83 students. This data is analyzed using SPSS version 20.0. The finding of the research shows that there was correlation between students’ vocabulary mastery and their ability in writing paragraph. The Pearson analysis shows that the correlation was 0,418 and it meant the correlation was moderate. It showed that the students’ vocabulary mastery has any correlation on the students’ ability in writing paragraph. Although the correlation coefficient is moderate but it can be seen that vocabulary mastery gave some effect in writing. So that, mastering the vocabulary is important for students in increasing their ability in writing paragraph. The more students have had vocabulary, the more students can make a good writing.