The Influence of Quizlet Application in Vocabulary Mastery Among English Department Students of IAIN Langsa

The objective of this research was to find out whether the use of Quizlet application influences students’ vocabulary mastery of the English Department of IAIN Langsa. The study was conducted at the Department of English Education of IAIN Langsa in the academic year 2016/2017. The sample of this study was taken from 34 students of Unit 1 and 2 in the 8th semester of the English Education Department of IAIN Langsa. The method used in this study was a quantitative method and the design used in this study was ex-post facto. In collecting the data, the researcher administered a test that consists of 32 questions to determine students' vocabulary mastery. After administering the test to the sample of the study, the researcher calculated it used a t-test in SPSS 22.0. The result of this research showed that there was a significant influence of Quizlet toward students’ vocabulary mastery of the English Department of IAIN Langsa. Based on the result of the calculation of the t-test, the gain of tobtained is 2,503 which is greater from ttable 2.064 or (2,503 > 2.064). Then, the mean of group B is 13, 2222 which is less than the mean of group A which is 18,6250 (13, 2222 < 18,6250). From this result, it can be concluded that Ha is accepted and Ho is rejected. It means that Quizlet application influence students’ vocabulary mastery. The conclusion of this research was, students who use Quizlet as a medium to vocabulary mastery are having better vocabulary mastery than those who do not.