Pengaruh Penggunaan Media Pembelajaran Berbasis Audio Visual terhadap Kemampuan Pembendaharaan Kosakata pada Anak Usia 4–5 Tahun di TK H. Dermawan Harahap Gonting Julu Huristak Padang Lawas

This study is motivated by the importance of vocabulary acquisition in early childhood as a foundation for language development, as well as the need for engaging and effective learning approaches. The research aims to examine the vocabulary development of children aged 4–5 years through audio-visual media-based learning and to measure its effect on their vocabulary mastery at TK H. Dermawan Harahap, Gonting Julu, Padang Lawas Regency. The method used is an experimental design with a One Group Pretest–Posttest design within a quantitative approach. The subjects were 4–5-year-old children who had not previously received instruction using audio-visual media. Data were collected through pre-test and post-test assessments designed to measure vocabulary ability before and after the intervention. The results show that the average pre-test score of 66.5% increased to 82% in the post-test, indicating a significant improvement. The Paired Samples Test yielded a significance value of p = 0.000, demonstrating that the use of audio-visual media has a significant effect on enhancing children's vocabulary skills. The study concludes that learning through audio-visual media is effective in enriching early childhood vocabulary, as the media combine visual and auditory elements that capture attention and facilitate children's understanding of new vocabulary.