The Utilization of Interactive Multimedia in Improving Vocabulary Knowledge of High School Students
DOI:
https://doi.org/10.21009/jtp.v26i2.46279Keywords:
English Learning, Interactive Multimedia, Vocabulary KnowledgeAbstract
In the current digital era, English education is becoming increasingly important. By integrating English language learning with digital learning media, it is hoped to create a more dynamic and student-centered learning environment. The goal is to facilitate students in achieving the set learning objectives. This research focuses on evaluating the effectiveness of interactive multimedia in improving English vocabulary comprehension in English subjects at the junior high school level. The research method employed is an experiment with a quasi-experimental design, involving pre and posttests in both control and experimental classes. The sample consists of 32 students from class VIII B (experimental group) and 32 students from class VIII C (control group) in SMPN 1 Jatisrono, selected using cluster random sampling from various classes. The experimental group receives treatment through learning activities using interactive multimedia, while the control group does not use interactive multimedia in the learning process. Data collection is conducted through attitude scale questionnaires filled out by junior high school students. The research findings indicate that the use of interactive multimedia significantly influences the improvement of students' English vocabulary comprehension. This is evidenced by the significant increase in students' English vocabulary knowledge after undergoing learning with interactive multimedia. Interactive multimedia is considered effective in influencing students' comprehension and helping them achieve learning objectives. Thus, interactive multimedia can be considered a suitable learning medium for English subjects at the junior high school level. The use of technology in such learning is crucial to keep up with the times and ensure that students have skills relevant to current global needs. This underscores the importance of integrating technology into education to create more effective and engaging learning experiences for students.
References
Afandi, Sajidan, Akhyar, M., & Suryani, N. (2019). Development Frameworks of the Indonesian Partnership 21st-Century Skills Standards for Prospective Science Teachers: A Delphi Study. Jurnal Pendidikan IPA Indonesia, 8(1), 89–100. https://doi.org/10.15294/jpii.v8i1.11647
Arsić, Z., & Milovanović, B. (2016). Importance of computer technology in realization of cultural and educational tasks of preschool institutions. International Journal of Cognitive Research in Science, Engineering and Education, 4(1), 9–16. https://doi.org/10.5937/IJCRSEE1601009A
Bischoff, K., Volkmann, C. K., & Audretsch, D. B. (2018). Stakeholder collaboration in entrepreneurship education: an analysis of the entrepreneurial ecosystems of European higher educational institutions. The Journal of Technology Transfer, 43(1), 20–46. https://doi.org/10.1007/s10961- 017-9581-0
Blesia, J. U., Iek, M., Ratang, W., & Hutajulu, H. (2021). Developing an Entrepreneurship Model to Increase Students’ Entrepreneurial Skills: an Action Research Project in a Higher Education Institution in Indonesia. Systemic Practice and Action Research, 34(1), 53–70. https://doi.org/10.1007/s11213- 019-09506-8
Buchori, Rahmawati, S., & Wardani, S. (2017). The Development of A Learning Media for Visualizing the Pancasila Values Based on Information and Communication Technology. Jurnal Cakrawala Pendidikan, 36(3), 502–521. https://doi.org/10.21831/cp.v36i3.12748
Çera, G., Cepel, M., Zakutna, S., & Rozsa, Z. (2018). Gender differences in perception of the university education quality as applied to entrepreneurial intention. Journal of International Studies, 11(3), 147–160. https://doi.org/10.14254/2071-8330.2018/11-3/13
Chasanah, N., Indriyati, E., & Ulfa, M. (2018). The Effect of Interactive Multimedia on Student Learning Outcomes in Physics. Journal of Physics: Conference Series, 983(1), 012031. https://doi.org/10.1088/1742-6596/983/1/012031
Dwi Riyanti, B. P., Sandroto, C. W., & Warmiyati D.W, M. T. (2016). Soft Skill Competencies, Hard Skill Competencies, and Intention to Become Entrepreneur of Vocational Graduates. International Research Journal of Business Studies, 9(2), 119–132. https://doi.org/10.21632/irjbs.9.2.119-132
Eladl, A., & Musawi, A. Al. (2020). Effects of students attitudes towards using E- books on their self-efficacy and academic motivation. European Journal of Educational Research, 9(3), 1167–1176. https://doi.org/10.12973/EU-JER.9.3.1167
Fardila, V., Subekti, S., & Setiawati, T. (2015). Manfaat Pembelajaran “Prakarya Dan Kewirausahaan” Dalam Penumbuhan Sikap Wirausaha Siswa SMPN 1 Cimahi. Media Pendidikan, Gizi, Dan Kuliner, 4(2), 66– 78. https://doi.org/10.17509/boga.v4i2.8421
Fauyan, M. (2019). Developing Interactive Multimedia Through Ispring on Indonesian Language Learning with The Insights of Islamic Values in Madrasah Ibtidaiyah. Al Ibtida: Jurnal Pendidikan Guru MI, 6(2), 177. https://doi.org/10.24235/al.ibtida.snj.v6i2.4173
GebreYohannes, H. M., Hadi Bhatti, A., & Hasan, R. (2016). Impact of multimedia in Teaching Mathematics. International Journal of Mathematics Trends and Technology, 39(1), 80–83. https://doi.org/10.14445/22315373/IJMTT-V39P510
Hartatik, S., Kurniawan, A. R., & Utami, E. S. (2018). The Effectiveness of Interactive Multimedia in Improving Students' Understanding of Mathematics Concepts. International Journal of Evaluation and Research in Education (IJERE), 7(2), 119-124. https://doi.org/10.11591/ijere.v7i2.12048
Howorth, C., Smith, S. M., & Parkinson, C. (2012). Social Learning and Social Entrepreneurship Education. Academy of Management Learning & Education, 11(3), 371–389. https://doi.org/10.5465/amle.2011.0022
Husein, S., Herayanti, L., & Gunawan, G. (2017). Pengaruh Penggunaan Multimedia Interaktif Terhadap Penguasaan Konsep dan Keterampilan Berpikir Kritis Siswa pada Materi Suhu dan Kalor. Jurnal Pendidikan Fisika Dan Teknologi, 1(3), 221. https://doi.org/10.29303/jpft.v1i3.262
Indah Septiani, A. nisa N. S., Septiani, I., Rejekiningsih, T., Triyanto, & Rusnaini. (2020). Development of
interactive multimedia learning courseware to strengthen students’ character. European Journal of Educational Research, 9(3), 1267–1279. https://doi.org/10.12973/eu-jer.9.3.1267
Irawan, E., & Suryo, T. (2017). Implikasi Multimedia Interaktif Berbasis Flash Terhadap Motivasi dan Prestasi Belajar Matematika. Beta Jurnal Tadris Matematika, 10(1), 33. https://doi.org/10.20414/betajtm.v10i1.17
Kao, C.-C., & Luo, Y.-J. (2020). Effects of Multimedia-Assisted Learning on Learning Behaviors and Student Knowledge in Physical Education Lessons: Using Basketball Game Recording as an Example. International Journal of Emerging Technologies in Learning (IJET), 15(01), 119–139. https://doi.org/10.3991/ijet.v15i01.11393
Khamzawi, S., & Wiyono, K. (2015). Pengembangan Multimedia Interaktif Berbasis Model Pembelajaran Problem Based Leaning Pada Mata Pelajaran Fisika Pokok Bahasan Fuida Dinamis Untuk SMP Kelas
XI. Jurnal Inovasi Dan Pembelajaran Fisika, 2(1), 100–108. https://doi.org/10.36706/jipf.v2i1.2594
Khan, F. M. A., & Masood, M. (2015). The Effectiveness of an Interactive Multimedia Courseware with Cooperative Mastery Approach in Enhancing Higher Order Thinking Skills in Learning Cellular Respiration. Procedia - Social and Behavioral Sciences, 176, 977–984. https://doi.org/10.1016/j.sbspro.2015.01.567
Khonthon, P. (2017). Developing an English Vocabulary Learning System Using Augmented Reality Technology. Journal of Educational Technology Development and Exchange (JETDE), 10(2), 1-14. https://doi.org/10.18738/jetde.20170009
Komalasari, K., & Rahmat, R. (2019). Living Values Based Interactive Multimedia in Civic Education Learning. International Journal of Instruction, 12(1), 113–126. https://doi.org/10.29333/iji.2019.1218a
Komalasari, K., & Saripudin, D. (2018). The Influence of Living Values Education-Based Civic Education Textbook on Student’s Character Formation. International Journal of Instruction, 11(1), 395–410. https://doi.org/10.12973/iji.2018.11127a
Kumar, R. R., & Hema, G. (2017). Effects Of Multimedia Instructional Strategy For Enhancing Students’ Learning And Retention In Mathematics. Journal on School Educational Technology, 13(2), 7–13. https://doi.org/10.26634/jsch.13.2.13826
Kurniawan, F. Y., Siahaan, S. M., & Hartono, H. (2020). Pengembangan multimedia interaktif berbasis adventure game pada materi prinsip animasi. Jurnal Inovasi Teknologi Pendidikan, 6(2), 183–195. https://doi.org/10.21831/jitp.v6i2.28488
Kurniawan, I. A., & Napitupulu, D. (2018). Influence of Interactive Multimedia on the Physics Learning Outcomes of High School Students. Journal of Physics: Conference Series, 947(1), 012072. https://doi.org/10.1088/1742-6596/947/1/012072
Kusa, R., Duda, J., & Suder, M. (2022). How to sustain company growth in times of crisis: The mitigating role of entrepreneurial management. Journal of Business Research, 142. https://doi.org/10.1016/j.jbusres.2021.12.081
Kusmintarti, A., Riwajanti, N. I., & Asdani, A. (2017). Pendidikan Kewirausahaan dan Intensi Kewirausahaan dengan Sikap Kewirausahaan sebagai Mediasi. Journal of Research and Applications: Accounting and Management, 2(2), 119. https://doi.org/10.18382/jraam.v2i2.160
Kuswanto, J., & Walusfa, Y. (2017). Pengembangan Multimedia Pembelajaran pada Mata Pelajaran Teknologi Informasi dan Komunikasi Kelas VIII. Innovative Journal of Curriculum and Educational Technology IJCET, 6(2), 58–64. https://doi.org/10.15294/ijcet.v6i2.19335
Leutner, D. (2014). Motivation and emotion as mediators in multimedia learning. Learning and Instruction, 29, 174–175. https://doi.org/10.1016/j.learninstruc.2013.05.004
Li, M., & Ren, Y. (2018). A Multimedia Teaching Model for “Sports Statistics” Based on ARCS Motivation Theory. International Journal of Emerging Technologies in Learning (IJET), 13(09), 15.
https://doi.org/10.3991/ijet.v13i09.8972
Maharani, Y. S., Suryani, N., & Ardianto, D. T. (2018). Pengembangan Multimedia Pembelajaran Interaktif Pada Mata Pelajaran Pengolahan Citra Digital di Sekolah Menengah Kejuruan Negeri 8 Semarang. Teknodika, 16(1), 73. https://doi.org/10.20961/teknodika.v16i1.34757
Mahdi, R., & Sakapurnama, E. (2019). Analysis On Entrepreneurial Intention, Motivation And Personality Traits: Study At Universitas Indonesia. Hasanuddin Economics and Business Review, 2(3), 201. https://doi.org/10.26487/hebr.v2i3.1679
Malik, S., & Agarwal, A. (2012). Use of Multimedia as a New Educational Technology Tool–A Study. International Journal of Information and Education Technology, 2(5), 468–471. https://doi.org/10.7763/ijiet.2012.v2.181
Manurung, & Panggabean. (2020a). Improving Students’ Thinking Ability In Physics Using Interactive Multimedia Based Problem Solving. Cakrawala Pendidikan, 39(2), 460–470. https://doi.org/10.21831/cp.v39i2.28205
Manurung, S. R., & Panggabean, D. D. (2020b). Improving students’ thinking ability in physics using interactive multimedia based problem solving. Cakrawala Pendidikan. https://doi.org/10.21831/cp.v39i2.28205
Marta, L. C. (2019). The Integration of digital devices into learning spaces according to the needs of primary and secondary teachers. TEM Journal, 8(4), 1351–1358. https://doi.org/10.18421/TEM84-36
Mayer, R. E. (2017). Using multimedia for e-learning. Journal of Computer Assisted Learning, 33(5), 403–423. https://doi.org/10.1111/jcal.12197
Meltzer, D. E. (2002). The relationship between mathematics prepration and conceptual learning gains in physics: a possible “hidden vaiable” in diagnostics pretest scores. American Journal of Phsysics, 70(12), 1269 – 1268. https://doi.org/10.1119/1.1514215
Mirzanti, I. R., Simatupang, T. M., & Larso, D. (2015). Mapping on Entrepreneurship Policy in Indonesia. Procedia - Social and Behavioral Sciences, 169, 346–353. https://doi.org/10.1016/j.sbspro.2015.01.319
Mitra, D., & Purnawarman, P. (2019). Teachers’ Perception Related to the Implementation of Curriculum 2013. Indonesian Journal of Curriculum and Educational Technology Studies, 7(1), 44–52. https://doi.org/10.15294/ijcets.v7i1.27564
Mukhyar, M. (2016). The Use of Interactive Multimedia in Learning Basic Mathematics in Primary Schools. International Journal of Sciences: Basic and Applied Research (IJSBAR), 28(2), 34-40. https://doi.org/10.1108/JSBED-08-2018-0281
Nugraha, C. A., & Wahyono, S. B. (2019). Developing Interactive Multimedia Learning for Psychomotor Domain to Students of Vocational High School. Jurnal Kependidikan: Penelitian Inovasi Pembelajaran, 3(2), 220–235. https://doi.org/10.21831/jk.v3i2.21797
Nurwahidah, L. S. (2017). Pembelajaran Literasi Berbasis Potensi Lokal Untuk Pengembangan Kearifan Lokal Dalam Upaya Pemberdayaan Perempuan. Caraka: “Jurnal Pendidikan Bahasa Indonesia & Bahasa Daerah STKIP-Garut, 6(2), 1–10. https://doi.org/10.31980/caraka.v6i2.83
Nusir, S., AlSMPdi, I., Al-Kabi, M., & Sharadgah, F. (2013). Studying the impact of using multimedia interactive programs on children’s ability to learn basic math skills. E-Learning and Digital Media, 10(3), 305– 319. https://doi.org/10.2304/elea.2013.10.3.305
Otache, I., Edopkolor, J. E., & Okolie, U. C. (2021). Entrepreneurial self-confidence, perceived desirability and feasibility of hospitality business and entrepreneurial intentions of hospitality management technology students. The International Journal of Management Education, 19(2). https://doi.org/10.1016/j.ijme.2021.100507
Pohan, H. P., & Arifin, S. (2016). The Effectiveness of Interactive Multimedia in Improving Physics Competence. International Journal of Education and Research, 4(5), 241-250. https://doi.org/10.17085/IJER.2016.50228
Pramita, M., Mulyati, S., & Susanto, H. (2016). Implementasi Desain Pembelajaran pada Kurikulum 2013 dengan Pendekatan Kontekstual. Jurnal Pendidikan, 1(3), 289–296.
Primamukti, A. D., & Farozin, M. (2018). Utilization of interactive multimedia to improve learning interest and learning achievement of child. Jurnal Prima Edukasia, 6(2), 111–117. https://doi.org/10.21831/jpe.v6i2.19183
Purusottama, A., & Trilaksono, T. (2019). The presence and persistence of entrepreneurship education In Indonesia: a cross sectional study. International Journal of Evaluation and Research in Education (IJERE), 8(1), 71. https://doi.org/10.11591/ijere.v8i1.16528
Rauch, A., & Hulsink, W. (2015). Putting Entrepreneurship Education Where the Intention to Act Lies: An Investigation Into the Impact of Entrepreneurship Education on Entrepreneurial Behavior. Academy of Management Learning & Education, 14(2), 187–204. https://doi.org/10.5465/amle.2012.0293
Rauf, R., Wijaya, H., & Tari, E. (2021). Entrepreneurship education based on environmental insight: Opportunities and challenges in the new normal era. Cogent Arts & Humanities, 8(1). https://doi.org/10.1080/23311983.2021.1945756
Rini, K. M. (2015). Analisis Kesiapan Guru Sekolah Dasar dalam Mengimplementasikan Pembelajaran Tematik Integratif Menyongsong Kurikulum 2013. JPI (Jurnal Pendidikan Indonesia), 3(2), 460–470. https://doi.org/10.23887/jpi-undiksha.v3i2.4462
Robles, L., & Zárraga-Rodríguez, M. (2015). Key Competencies for Entrepreneurship. Procedia Economics and Finance, 23, 828–832. https://doi.org/10.1016/S2212-5671(15)00389-5
Sakthi, T., & Moshi, A. A. M. (2021). Effectiveness measurement study on entrepreneurship awareness camp for technical education students using Kirkpatrick’s model. Materials Today: Proceedings, 45(2). https://doi.org/10.1016/j.matpr.2020.08.419
Santi, E. A., Gorghiu, G., & Pribeanu, C. (2020). Teachers’ Perceived Self-Efficacy Concerning the Use of Mobile Technology in Education, Considering the “Working from Home” Format. Revista Romaneasca Pentru Educatie Multidimensionala, 12(1Sup2), 157–166. https://doi.org/10.18662/rrem/12.1sup2/259
Saputro, S. D., & Setyawan, A. (2020). The Effectiveness Use of Virtual Reality Media in Physics Education of Solar System Towards Cognitive Learning Outcomes. JPI (Jurnal Pendidikan Indonesia), 9(3), 389–
https://doi.org/10.23887/jpi-undiksha.v9i3.23105
Sari, A. I., Suryani, N., Rochsantiningsih, D., & Suharno, S. (2020). Digital Learning, SMPrtphone Usage, and Digital Culture in Indonesia Education. Integration of Education, 24(1), 20–31. https://doi.org/10.15507/1991-9468.098.024.202001.020-031
Sari, R. U., Rusdarti, R., & Syamwil, R. (2017). Pengembangan Model Pembelajaran Kewirausahaan Berbasis Potensi Lokal di Sekolah Kejuruan Wilayah Kalimantan Barat. Journal of Vocational and Career Education, 2(2), 87–95. https://doi.org/10.15294/jvce.v2i2.13858
Sert, N., & Boynueğri, E. (2016). Digital technology use in ELT classrooms and self-directed learning. World Journal on Educational Technology, 8(1), 51. https://doi.org/10.18844/wjet.v8i1.501
Sert, N., & Boynueğri, E. (2017). Digital technology use by the students and english teachers and self- directed language learning. World Journal on Educational Technology: Current Issues, 9(1), 24. https://doi.org/10.18844/wjet.v9i1.993
Shatri, Z. G. (2020). Advantages and Disadvantages of Using Information Technology in Learning Process of Students. Journal of Turkish Science Education, 17(3). https://doi.org/10.36681/used.2020.36
Shi, X. & Lu, Y. (2019). The Construction of English Multimedia Teaching Materials Based on College English Curriculum. International Journal of Emerging Technologies in Learning (iJET), 14(3), 178-190. https://doi.org/10.3991/ijet.v14i03.9069
Shi, X. (2017). Application of multimedia technology in vocabulary learning for engineering students. International Journal of Emerging Technologies in Learning, 12(1), 21–31. https://doi.org/10.3991/ijet.v12i01.6153
Softić, S. K. (2015). Teacher’s technology use and attitude towards e-learning in higher education.
Proceedings of the European Distance and E-Learning Network 2015 Annual Conference, 531–539.
Sriyati, S., Suryadi, D., & Napitupulu, E. E. (2019). The Effectiveness of Interactive Multimedia on Students' Mathematical Learning Outcomes in Public Junior High Schools in Indonesia. International Electronic Journal of Mathematics Education, 14(2), 275-286. https://doi.org/10.29333/iejme/5737
Sugiyono. (2018). Metode penelitian kuatintatif , kualitatif dan R & D. In Bandung: Alfabeta.
Sukardi, S. (2016). Desain Model Prakarya dan Kewirausahaan Berbasis Ekonomi Kreatif Berdimensi Industri Keunggulan Lokal. Jurnal Cakrawala Pendidikan, 1(1), 114–124. https://doi.org/10.21831/cp.v1i1.8381
Suwanto, B. S., Mubin, M., & Junaidi, A. (2019). Utilization of Interactive Multimedia to Improve Students' Learning Motivation in the Subject of Vertebrate Animals. International Journal of Active Learning, 4(1), 1-11. https://doi.org/10.22515/ijal.v4i1.1576
Suwena, K. R. (2016). Pentingnya Penilaian Potensi Diri Wirausaha Sebagai Pondasi Untuk Mensukseskan Program Mahasiswa Wirausaha. Jurnal Ilmu Sosial Dan Humaniora, 4(2). https://doi.org/10.23887/jish-undiksha.v4i2.6385
Suyantiningsih, Munawaroh, I., & Rahmadona, S. (2016). Pengembangan Multimedia Pembelajaran Berbasis Scientific Approach Terintegrasi Nilai Karakter. Jurnal Kependidikan, 46(1), 1–13.
Suyitno, S. (2016). Pengembangan Multimedia Interaktif Pengukuran Teknik untuk Meningkatkan Hasil Belajar Siswa SMK. Jurnal Pendidikan Teknologi Dan Kejuruan, 23(1), 101–109. https://doi.org/10.21831/jptk.v23i1.9359
Syawaludin, A., Gunarhadi, & Rintayati, P. (2019). Development of augmented reality-based interactive multimedia to improve critical thinking skills in science learning. International Journal of Instruction, 12(4), 331–344. https://doi.org/10.29333/iji.2019.12421a
Tanti, D. R., & Khoiri, N. (2019). The Use of Interactive Multimedia Learning to Improve Science Learning Achievement in Primary School. International Journal of Psychosocial Rehabilitation, 23(1), 1155-1164. https://doi.org/10.37200/IJPR/V23I1/PR190343
Tondeur, J., Pareja Roblin, N., van Braak, J., Voogt, J., & Prestridge, S. (2017). Preparing beginning teachers for technology integration in education: ready for take-off? Technology, Pedagogy and Education, 26(2), 157–177. https://doi.org/10.1080/1475939X.2016.1193556
Tondeur, J., van Braak, J., Siddiq, F., & Scherer, R. (2016). Time for a new approach to prepare future teachers for educational technology use: Its meaning and measurement. Computers & Education, 94, 134– 150. https://doi.org/10.1016/j.compedu.2015.11.009
Utami, S., Wahyuni, S., & Ariani, A. (2020). Application of Interactive Multimedia Learning Models to Improve Learning Achievement of 4th Grade Students of Islamic Elementary Schools in Surakarta. Journal of Nonformal Education and Counseling (JNEK), 6(2), 168-174. https://doi.org/10.15294/jnek.v6i2.33560
Widyaningsih, S. W., Yusuf, I., Prasetyo, Z. K., & Istiyono, E. (2020). Online Interactive Multimedia Oriented to HOTS through E-Learning on Physics Material about Electrical Circuit. JPI (Jurnal Pendidikan Indonesia), 9(1), 1–14. https://doi.org/10.23887/jpi-undiksha.v9i1.17667
Wijaya, E. Y., Sudjimat, D. A., & Nyoto, A. (2016). Transformasi Pendidikan Abad 21 Sebagai Tuntutan. Jurnal Pendidikan, 1, 263–278
Wulandari, E., Hartono, Y., & Sutarno, S. (2020). The Development of Learning Devices Based on Interactive Multimedia in the Material of The Number Operations to Improve Student Learning Outcomes. Journal of Physics: Conference Series, 1521(4), 042079. https://doi.org/10.1088/1742-6596/1521/4/042079
Yue, N. (2017). Computer multimedia assisted English vocabulary teaching courseware. International Journal of Emerging Technologies in Learning, 12(12), 67–78. https://doi.org/10.3991/ijet.v12.i12.7955
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