THE EFFECT OF GROUP INVESTIGATION STRATEGY ON STUDENTS’ WRITING ABILITY OF NARRATIVE TEXT AT GRADE X OF SMK NEGERI 2 KISARAN IN ACADEMIC YEAR OF 2016/2017

Abstract

This study aims of this research is to investigating The Effect of Group Investigation Strategy on Students’ Writing Ability of Narrative Text. Method of the study which is used in the research is a quantitative method, i.e experimental research. The population of this study was the students at grade X TKJ 1 of SMK Negeri 2 Kisaran. The total number of the population was 105 students in four classes. There were 40 students chosen as the sample by using random sampling technique. The sample was divided into two group, namely control group and experimental group. The experimental group was thaught by using Group Investigation Strategy and control group was taught without using Group Investigation Strategy. The instrument for collecting the data was writing test. Reasult of this study is that the pretest mean score (x) are 61,9 and 66,5. On the other hand, the students post-test sscore (y) are 70,75 and 80,9. Implementation of group investigation strategy is effective way for improving students writing, because the both control group and experimental group score pre-test better then post-test. The data was analyzed by using t-test formula. The result of analysis shows that t-observed value is higher than t-table (2.46>2.042) at level of significance 0.05 with the degree of freedom 38. It means that the alternative hypothesis (Ha) is accepted and H null hypothesis (Ho) is rejected. Based on the findingd of this study, it was found that there is a significant effect of Group Investigation Strategy on Students’ Writing Ability of Narrative Text.