The effect of mind mapping technique on students? vocabulary mastery: an experimental study at the eighth grade students of SMP Muhammadiyah Gunung Putri Bogor

The objective of the research was to get the information about mind mapping technique in teaching vocabulary; moreover it was conducted to get the effective technique in teaching vocabulary at the Eighth Grade students of SMP Muhammdiyah Gunung Putri Bogor. The sample of the research was 31 students in both of class. This research was using experimental method by collecting data from pre-test and post-test. The data collected in this research were analyzed by using t-test. According to the result of statistical calculation, it was obtain the value of (t observation) that ( = 3.69) and (t-table) from degrees of freedom 60 in significance level 0.05 is 1.67. It means that the value of is higher than the value of . Based on the result the null hypothesis (Ho) which was there was no significance in students? vocabulary mastery with mind mapping technique was rejected. It means that the alternative hypothesis (Ha) which was there was significance in students? vocabulary mastery with mind mapping technique was accepted. Based on finding of this study, it can be concluded that mind mapping technique was effective and quite success in the class situation. By using mind map, students can maximize their ability in note-taking with picture and colors; students feel more interesting and enjoy doing activities in the class. It can also give the students the opportunities to be active in learning vocabulary