%A 0713042019 Deri Herdawan %T A COMPARATIVE STUDY OF STUDENTS WRITING ACHIEVEMENT BETWEEN EXTROVERT AND INTROVERT STUDENTS PERSONALITY AT THE SECOND YAR OF SMAN 7 BANDAR LAMPUNG %X lish as a means of communication, in all four English skills. However, most students do not have equal achievement in all English skills. Some students perform better in one skill, while the rest do better in other skills. This research was done in order to see whether there is a significant difference in writing achievement between students who are introvert and extrovert at the second grade of SMAN 7 Bandar Lampung. The participants of the research were the students of the second grade of SMAN 7 Bandar Lampung in the academic year 2011/2012. Two classes were taken as the sample. Each class consisted of forty students. The research design was ex post facto and the data were taken from questionnaire and writing test, and then they were analyzed by using Independent T-Test to test the hypothesis. The result of the data analysis shows that achievement in writing differs between extrovert and introvert students. The difference in mean score of writing was 4.3 in which the mean of extrovert students, 70.3, is higher than the introvert students, 66.0. The researcher used Independent T-Test at the significance level (0.05) to prove whether the hypothesis was accepted or not. The computation showed that t-ratio (2.183) is higher than the t table (1.671); it means t-ratio>t-table. It can be concluded that the in is significantly higher than the introvert ones. In other words, the alternative hypothesis is accepted. ii %D 2012 %I Universitas Lampung %L eprints11716