【引用文献】
1 Atkinson, D. （1987）. Teaching in the target language; a problem in the currentorthodoxy. Language Learning Journal, 8, 2-5.
2 Black, C., & Butzkamm, W. （1978）. Classroom language: Materials for communicative language teaching. English Language Teaching Journal, 13, 270-274.
3 Brooks-Lewis, K. A. （2009）. Adult learners’ Perceptions of the incorporation of their L1in Foreign language teaching and learning. Applied Linguistics, 30, 216-253.
4 Butzkamm, W. （2003a）. We only learn language once. The role of the mother tongue in FL classrooms: death of a dogma. Language Learning Journal, 28, 29-39.
5 Butzkamm, W. （2003b）. Medium-oriented and message-oriented communication. In M.Byram （Ed.）, Routledge Encyclopedia Language Teaching and Learning （ pp. 406–407 ）.London: Routledge.
6 Çelik, S. （2008）. Opening the door: An examination of mother tongue use in foreignlanguage classrooms. Hacettepe University Journal of Education, 34, 75–85.
7 Cook, V. （2001）. Using the first language in the classroom. The Canadian Modern Language Review, 57（3 ）, 402-423.
8 Chambers, F. （1991）. Promoting use of the target language in the classroom. The Language Learning Journal, 4, 27-31.
9 Critchley, M. P. （2002）. The role of L1 support in communicative ELT: A guide for teachers in Japan. JALT 2002 Conference Proceedings, 119–126.
10 Ellis, R. （1984）. Classroom Second Language Development. Oxford: Pergamon.
11 Franklin, C. E. M. （1990）. Teaching in the target language: Problems and prospects.The Language Learning Journal, 2（1 ）, 20-24.
12 Green, J. F. （1970）. The use of mother tongue and the teaching of translation. English Language Teaching Journal, 24（3 ）, 217-223.
13 Harbord, J. （1992）. The use of the mother tongue in the classroom. English Language Teaching Journal, 46（4）, 350-355.
14 Critchley, M. P. （2002）. The role of L1 support in communicative ELT: A guide forteachers in Japan. JALT 2002 Conference Proceedings, 119–126.
15 Kang, D. -H. （2008）. The classroom language use of a Korean elementary school EFL teacher: Another look at TETE. System, 36, 214-226.
16 Kim, Y., & Petraki, E. （2009）. Student’s and Teachers’ Use of and Attitudes to L1 in the EFL classroom. Asian EFL Journal, 11, 58–89.
17 Krear, S. E. （1969）. The role of the mother tongue at home and at school in the development of bilingualism. English Language Teaching Journal, 24（1 ）, 2-4.
18 Krieger, D. （2005）. Teaching ESL versus EFL principles and practices. English Teaching Forum, 43, 8-16.
19 Levine, G. （2003）. Student and instructor beliefs and attitudes about target languageuse, first language use, and anxiety: report of a questionnaire study. The Modern Language Journal, 87, 343-364.
20 Macaro, E. （1995）. Target language use in Italy. Language Learning Journal, 11, 52-55.
21 Macaro, E. （2001）. Analysing Student Teachers’ Codeswitching in Foreign Language Classrooms: Theories and Decision Making. The Modern Language Journal, 85, 531-548.
22 Macaro. A., Curle, S., Pun, J., An, J., & Dearden, J. （2018）. A systematic review of English medium instruction in higher education. Language Teaching, 51, 36-76.
23 Mattioli, G. （2004）. On native language intrusions and making do with words:Linguistically homogenous classrooms and native language use. English Teaching Forum, 42（4 ）, 20-25.
24 Mitchell, R. （1983）. The teacher’s use of first language and foreign language as means of communication in the foreign language classroom. In C. Brumfit （Ed.）, Learning and Teaching Languages for Communication: Applied Linguistics Perspective, （pp. 41-58 ）.Centre for Information on Language Teaching. Eric microfiche.
25 表 昭浩（2012）オールイングリッシュの授業を教師はどう思っているのか―インタビュー法による教師ビリーフの質的分析―『関西大学大学院外国語教育学研究科紀要』第10号21-56頁
