6CHAMBERS G N. Talking the ' de' out of demotivation[J]. Language Learning Journal, 1993(7) :13-16.
7USHIODA E. Effective motivational thinking: a cognitive theoretical approach to the study of language learning motivation [ C ]//SOLER E A, ESPURZ V C. Current Issues in English Language Methodology. Universitat Jaume I, Castell6 de la Plana, Spain, 1998:77-89.
8GORHAM J, CHRISTOPHEL D. Students" perception of teacher behaviors as motivating and demotivating factors in college classes[ J]. Communication Quarterly, 1992(40) : 239-252.
9GLASER B G, STRAUSS A L. The discovery of grounded theory: strategies for qualitative research[ M]. New York: A1-dine, 1967 : 1.
10CHRISTOPHEL D, GORHAM J. A test-retest analysis of student motivation, teacher immediacy and perceived sources of motivation and demotivation in college classes [ J ]. Communication Education, 1995 (44) :292-306.