THE EFFECT OF ROSETTA STONE APPLICATION ON STUDENTS’ VOCABULARY MASTERY IN THE ELEVENTH GRADE AT SMAN 1 BARUSJAHE

Abstract

This thesis about The Effect of Rosetta Stone Application on Student’s Vocabulary Mastery in the Eleventh Grade of SMAN 1 Barusjahe. The objective of the study is intended to find out the effect of Rosetta Stone Application on students’ vocabulary mastery in SMAN 1 Barusjahe. The research design used in this study was experimental quantitative design which true experimental. The population of this study is the Grade XI students of SMAN 1 Barusjahe with six classes, and there are (184) students totally. The sample of the research is two classes, that selected by using random sampling. The sample is divided into two groups; the first group is 20 students as the experimental group. The second group is 20 students as the control group. The instrument used for collecting the data was test in the form of multiple choices with the total number of 40 questions. The tests are divided into two; pre-test and post-test. The data was analyzed by using t-test formula in order to see whether the Rosetta Stone application affects students’ vocabulary mastery. The result of the analysis shows that t-test (2,36), it is higher than the t-table (1,686) with the level of significant (0,05) and the degree of freedom (df) (38). The result of the analysis shows that the alternative hypothesis (Ha) of the study is accepted and the null hypothesis (Ho) is rejected because t-test > t-table =2,36 > 1,686. Rosetta Stone application is very helpful for students in learning English because there are many topic material and the exercises so challenging so that the students not bored in learning English. It is concluded that the Rosetta Stone application recommended in the students’ vocabulary mastery at eleventh grade of Senior High School because it is above of KKM (75).