Daftar Isi:
  • The aim of this study was to find out the effectiveness of audio-visual aid could improve student's vocabulary mastery or not. The subjects analyzed in this research were the eight grade students of SMP Negeri 1 Gondang Mojokerto. The experimental group was VIII-B while the control group was VIII-A. The research design in this study was quantitative. This study employed quasi pre-test post-test design to examine if there were different scores between the experimental group using audio-visual and control group without using audio-visual. In this study the instruments used were a vocabulary test; pre-test and post-test. The pre-test was given to all of eight grades to know which classes had almost similar level of ability. After the pre-test was given to both groups, then the experimental group was treated or taught by using audio-visual, while the control group was not treated by using audio-visual. Then, the post-test was also given to both experimental and control group. The researcher used independent sample t-test to know the significant difference between the post test score of the experimental and control group. The process of t-test was counted using computer SPSS 21 version. The result of this study was shown that using audio-visual aids effective to improve students' vocabulary mastery due to the score of post-test score in experimental group 95.3125 was higher than the control group 89.0625. Accordingly, related to the result of this experimental research, the researcher concludes that audio-visual can improve students' vocabulary mastery of the eight grade students of junior high school.