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4th August 2020 Faculty of Liberal Arts, Mahidol University, Salaya Campus, Nakorn Pathom The 7th Symposium of International Languages and Knowledge 2020 (SILK2020) 4th August 2020 At Faculty of Liveral Arts, Mahidol University, Salaya Campus, Nakorn Pathom, Thailand Organizer: Mahidol University Co-Organizers: Thonburi Univeristy (TRU) Rajamangala University of Technology Srivijaya (RUTS) Universiti Malaysia Perlis (UniMAP) Walailak University (WU) Thaksin University (TSU) Srinakharinwirot University (SWU) Chiang Rai Rajabhat University (CRRU) Songkhla Rajabhat University (SKRU) Rajamangala University of Technology Rattanakosin (RMUTR) Rajamangala University of Technology Isan (RMUTI) Rajamangala University of Technology Lanna (RMUTL) Rajamangala University of Technology Phra Nakhon (RMUTP) Rajamangala University of Technology Suvarnabhumi (RMUTSB) Rajamangala University of Technology Tawan-ok (RMUTTO) Rajamangala University of Technology Thanyaburi (RMUTT) Rajamangala University of Technology Krungthep (RMUTK) 4th August 2020 Faculty of Liberal Arts, Mahidol University, Salaya Campus, Nakorn Pathom Welcome Speech of the Dean, Faculty of Liberal Arts, Mahidol University Assistant Professor Dr. Thanayut Thanathiti (ผู้ช่วยศาสตราจารย์ ดร.ธนายุส ธนธิติ) for The 7th Symposium of International Languages and Knowledge 2020 (SILK2020) 4th August, 2020 At Room 729, 7th Floor of Siriwittaya Building, Faculty of Liberal Arts, Mahidol University, Salaya, Nakorn Pathom, Thailand The Vice President for International Relations and Corporate Communication of Mahidol University, the President of Thonburi University, the President of the Thai Simulation and Gaming Association (ThaiSim), the President of Rajamangala (ราชมังคลา) University of Technology Srivijaya (ศรีวิชัย), the Vice Chancellor of Universiti Malaysia Perlis, the committees, distinguished guests and all participants. On behalf of the Faculty of Liberal Arts, I am pleased to welcome to you to the 7th Symposium of International Languages and Knowledge 2020. It is an honor of the Faculty of Liberal Arts to host this wonderful international conference. It is also a challenge for us to hold this virtual online conference during the COVID 19 situation. However, 4th August 2020 Faculty of Liberal Arts, Mahidol University, Salaya Campus, Nakorn Pathom the conference has been well accepted by many professors, students, and researchers with 53 papers submitted for presentation to this conference. I would like to thank you all organizing members for their kind support in arranging conference facilities. If you have any problems or inconvenience, please contact our staff. They are happy to assist you. However, please accept our apologies for any inconvenience we may have caused. Before closing, I have to extend further thanks to all of our networking institutions, who greatly helped in organizing these conferences. I am also grateful to many experts who have come to share their knowledge today. Thank you. *************************** 4th August 2020 Faculty of Liberal Arts, Mahidol University, Salaya Campus, Nakorn Pathom REVIEWERS No. Name Organisation Country 1 Sharmini Abdullah (Ph. D.) Universiti Malaysia Perlis Malaysia 2 Rozilawati Mahadi (Ph.D.) Universiti Malaysia Perlis Malaysia 3 Ina Suryani (Ph. D.) Universiti Malaysia Perlis Malaysia 4 Dipima Buragohain (Ph. D.) Universiti Malaysia Perlis Malaysia 5 Harshita Aini Haroon (Ph. D.) Universiti Malaysia Perlis Malaysia 6 Faharol Zubir Universiti Malaysia Perlis Malaysia 7 AfiFah Hanani Universiti Malaysia Perlis Malaysia 8 Norlizawati Ghazali Universiti Malaysia Perlis Malaysia 9 Loo Shih Min (Ph. D.) Universiti Malaysia Perlis Malaysia 10 Rhodora I Delra Rosa (Ph. D.) Central Luzon State Philippines University 11 Norkhairi Bin Ahmad (Ph. D.) Universiti Kuala Lumpur Malaysia Malaysia France Institute 12 Rungpat Roengpitya (Asst.Prof. Ph.D.) Mahidol University Thailand 13 Somboon Pojprasat (Asst.Prof. Ph.D.) Mahidol University Thailand 14 Paisan Sukjairungwattana (Ph. D.) Mahidol University Thailand 15 Suppachai Chanwanakul (Ph.D.) Mahidol University Thailand 16 Rangsima Ninrat (Ph.D.) Mahidol University Thailand 17 Suthathip Thirakunkovit (Asst.Prof. Ph.D.) Mahidol University Thailand 18 Payungsak Kaenchan (Ph.D.) Mahidol University Thailand 19 Kornsiri Boonyaprakob (Ph.D.) Mahidol University Thailand 20 Wipapan Ngampramuan (Ph.D.) Mahidol University Thailand 21 Natthapong Chanyoo (Asst.Prof. Ph.D.) Mahidol University Thailand 22 Tanporn Trakantalerngsak (Ph.D.) Mahidol University Thailand 23 Yuwadee Tirataradol (Ph.D.) Mahidol University Thailand 24 Wichaya Bovonwiwat (Ph.D.) Mahidol University Thailand 25 Pitchanee Sotthiyothin (Ph.D.) Mahidol University Thailand 4th August 2020 Faculty of Liberal Arts, Mahidol University, Salaya Campus, Nakorn Pathom No. Name Organisation Country 26 Thapanee Musiget (Ph.D.) Mahidol University Thailand 27 Aj. Rhee Seongha Mahidol University Thailand 28 Tassanee Kirisri (Assoc. Prof. Ph.D.) Rajamangala Thailand University of Technology Srivijaya (RUTS) 29 Jutaporn Parapob (Asst. Prof. Ph.D.) Rajamangala Thailand University of Technology Srivijaya (RUTS) 30 Kittima Tantihachai (Ph.D.) Rajamangala Thailand University of Technology Srivijaya (RUTS) 4th August 20202020 Faculty of Liberal Arts, Mahidol University, Salaya Campus, Nakorn Pathom Full paper CONTENTS Page 1: Kamonnate Iadkert, Azirah Hashim: 1 An acoustical analysis of diphthongs in Thai English 2: Jirayu Songkhro: 9 Challenges in Teaching Culture in EFL Classroom 3: Lauro Dequina Jr., Phanlapa Khathayut, Treetasat Piboon, Kajohnpong Mahasawad, Karittha Suwanmanee: 16 The Effectiveness of the Tutorial YouTube Video on Conjunctions in Improving the Writing Skills of the First Year EIC Students, Rajamangala University of Technology Srivijaya 4: Achiraya Promsathit, Nattacha Jaihow, Thanyaporn Sriyapan, Metas Panich: 24 Development of Chinese Conversation Blog for Pre-Internship Students 5: Phanlapa Khathayut: 31 “How can I avoid plagiarism, as I don’t know how to paraphrase and cite sources properly?”: An exploration of Thai students’ understanding of plagiarism 6: Jittima Choopun, Arkhom Luksanasakul, Patcharin Kangkha: 41 The Development of an ESP Instructional Material for Electrical Engineering Students of Rajamangala University of Technology Srivijaya 7: Mitchelle R. Juaban, Somporn Maneechote, Peeraya Saraviroj, Kusumaiyah Dunkhade, Chatchawan Nuprasong: 50 Self-Generated Website: Enhancing Academic Verb Acquisition of Thai EFL Learners 8: Ryan Rommel M. Dominguez, Kittima Tantihachai, Chananat Chuvilai, Worapan Jinda, Jenjira Thainthong: 59 The Impact of Self-Generated YouTube Pronunciation Video on Improving Thai EFL Learners‟ Pronunciation Ability 9: Vikrom Chantarangkul: 67 The Effectiveness of an English Research Writing Manual for Students in English for Communication Program 10: Palachai Khaonuan, Patcharin Kangkha, Suchada Buntho: The Use of an Electronic Student Portfolio to Promote the Undergraduate English 72 Vocabulary Skills at Faculty of Engineering, Rajamangala University of Technology Srivijaya 4th August 2020 Faculty of Liberal Arts, Mahidol University, Salaya Campus, Nakorn Pathom Page 11: Taksuriya Madsa, Aree Tehlah, Chakrit Wangsa: 81 The Strategy of Language Learning Used in EFL Industrial Students at Rattaphum College, RUTS 12: Umapan Nunsong, Passada Thandee, Awatif Che-awae, Patimoh Yuso: 86 EFL Learners‟ Views on English Idioms Learning through Netflix 13: Siriporn Tichachart, Sirinan Nuypukiaw: 94 Hidden English Learning Obstacles in English Classroom: A Case Study of Public Administration Students of Phranakhon Si Ayutthaya Rajabhat University 14: Sirinan Nuypukiaw, Siriporn Tichachart: 102 Factors Affecting English Reading Capacity between First-Year and Second-Year English Major Students at a State University in Phranakhon Si Ayutthaya 15: Alongkorn Chantaravipak, Songsri Soranastaporn, Orrathip Geerathivudhipong: 110 The Creative Thinking Ability of Matthayomsuksa 6 students in AEC 4Fun Game 16: Nattapoom Khoomboon, Songsri Soranastaporn: 116 Thai ELF Learners‟ Pronunciations in the Final Two-consonant Clusters: A Case Study 17: Nattapoom Khoomboon: 123 The Variation of Post-copula Nominal Pivots in English there-Existential Constructions: The Corpus-based Analysis 18: Sophea Yin, Natthapong Chanyoo: 133 An Analysis of L1 Interference in the Writing Composition of Cambodian EFL Learners 4th August 2020 Faculty of Liberal Arts, Mahidol University, Salaya Campus, Nakorn Pathom An acoustical analysis of diphthongs in Thai English Kamonnate Iadkert1 and Azirah Hashim2 1Department of English for Communication, Faculty of Science and Technology, Rajamangala University of Technology, Nakhon Si Thammarat, 80110 Thailand 2Faculty of Languages and Linguistics, University of Malaya, Kuala Lumpur, 50603, Malaysia Abstract. Thai learners who speak Thai as a first language (L1) are typically monolingual speakers of Thai. L1 influence plays a vital role in how Thai learners produce English vowels, especially diphthongs. This study investigated how Thai learners produced six diphthongs, including , , /, , and . This study extracted formant frequencies (F1 and F2) that were used to plot vowel charts in the Bark scale and to evaluate ROC values. The vowel tokens were recorded from the participants reading a passage. The results revealed that and show the greatest formant movement in vowel height change compared to the other diphthongs. Among the six diphthongs, the positive value of F2 ROC is only in shows no backward