The main problem in this research is students' knowledge of the impact of early marriage. The purpose of this study was to examine the effect of audio-visual technical information services on increasing knowledge of the impact of early marriage. This type of research is quantitative using experimental methods. The research design used is pre-experimental design with type the one group pretest-posttest design. The results of this study indicate that audio-visual technical information services have a significant effect on increasing students' knowledge of the impact of early marriage. This can be seen from the results of the analysis which shows that t count ? t table.
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