THE EFFECTIVENESS OF GROUP INVESTIGATION (GI) METHOD ON STUDENTS’ WRITING DESCRIPTIVE TEXT
This research was aimed at finding the effectiveness of Group Investigation in teaching writing Descriptive text on eighth grade students at SMP Negeri 10 Tanjungpinang. This research used quasi experimental design. The participants of this research were the eighth grade students at SMP Negeri 10 Tanjungpinang. They were VIII 2 class and VIII 6, which VIII 2 was the experimental class and VIII 6 was the control class. To know the effect of the treatments, pre-test and pos-test was done. The test was in the form of writing test. The data of the test was analyzed using statistical analysis of the mean and t-test. The mean score of the experimental class was 59.52 for pre-test and 65.93 for post-test. Meanwhile, the mean score of pre-test and post-test in the control class was 58.26 and 62.07. However, the mean score of the experimental class was higher than that of the control class. Furthermore, the t-test result was a sig. (2-tailed) 0.044 lower than the level significance 0.05. Based on the mean score and t-test calculation, there was a significant effective after the treatments in experimental class. In conclusion, the hypothesis was accepted that Group Investigation (GI) method was effective to teach writing Descriptive text at eighth grade students at SMP Negeri 10 Tanjungpinang.