This study was formulated to discover the improvement in vocabulary competence by using songs in YouTube which were carried out over the course of six weeks and a total of 12 sessions. The vocabulary pretest and posttest were administered with both groups at the beginning of the study and at the end of treatment period respectively. The data obtained was used to show the changes between the experimental and the control groups. As to provide in-depth knowledge of the findings, observations were also carried out during the English lessons for both groups. Both groups were observed by the researchers guided by a checklist. In addition to observations, the participants were required to write journal entries where 18 journal entries of the participants from the samples were selected to be reviewed.
Based on the quantitative findings and data obtained from the pretest and posttest, it was derived that the participants who went through the method of using songs in YouTube to improve vocabulary for six weeks experienced more significant improvement in their vocabulary competence. This was prevalent when the paired t-test was conducted and the mean difference obtained was larger than that of the control group. Throughout the six-week observational period, the researchers noticed changes in vocabulary competence among the participants though it did not take effect immediately. In addition, the changes were more consistent in the experimental group as compared to the control group. The participants in the control group did not show much improvement in their vocabulary competence as compared to the experimental group. Besides, through their journal entries, it was revealed that they found the lessons quite monotonous, and that their teacher probed too much for the answers. In other words, the lessons were more teacher-centred.