2Ehrman M E, Leaver B L, Oxford R L. A brief overview of individual differences in second language learning. System, 2003, 31:313- 330.
3Midori Kimura. Affective Factors of Japanese EFL Learners at Junior College in the Oral Communication Tasks.
4Horwitz E K, Horwitz M B, Cope J. Foreign Language classroom anxiety. The Modem Language Journal, 1986, 70:125 - 132.
5Aida Y. Examination of Horwitz, Horwitz, and Cope's construct of foreign language anxiety: The case of students of Japanese. Modem Language Journal, 1994,78:155- 168.
6Clement R, Domyei Z, Noels K A. Second language proficiency and acculturation : An investigation of the effects of language status and individual characteristics. Language Learning, 1994,44:417 - 448.
7Sanchez-Herrero S A, Sanchez M P. The predictive validation of an instrument designed to measure strdent anxiety in learning a foreign language. Educational and Psychological Measruement, 1992, 52:961 -966.
8Oxford Rebecca L. Ehrman Madeline E. Adults' Language Learning Strategies in an Intensive Foreign Language Program in the United States. System, 1995, 359-386.
9Truitt S N. Anxiety and beliefs about language learning: A study of Korean university students learning English. Unpublished doctoral dissertation, University of Texas at Austin.1995. In Horwitz, E K. Student affective reactions and the teaching and learning of foreign language, International Journal of educational Research, 1995,7:573 - 579.
10Gareia T, Pintrich T R. Assessing students' motivation and learning strategies in the classroom context: The motivated strategies for learning questionnaire. In Brenbaum T. Doocby Filip JRC eds. Alternative in assessment of achievements, learning processes and prior knowledge. London: Kluwer Academic Publishers. 1996,319 - 339.