1Budner, S. (1962), Intolerance of Ambiguity as a Personality Variable [J]. Journal of Personality Assessment, (30).
2Chapple, C. & Roberts, C. (1986), Ambiguity Tolerance and Field Independence as Predictors of Proficiency in English as a Second Language [J]. Language Learning (36).
3Brown, H.D. (2002), Principle of Language Learning and Teaching [M]. Beijing: Foreign Language Teaching and Research Press.
4Mclain,D.L.(1993) The MSTAT-1: A new Measure of an Individual's Tolerance for Ambiguity [J]. Education and Psychological Measurement, (53).
5Norton,R.W. (1975), Measurement of Ambiguity Tolerance [J]. Journal of Personality Assessment, (39).
6O'Malley, J.& Chamot,A. (1990), Learning Strategies in Second Language Acquisition [M]. Cambridege: Cambridge University Press.
7Oxford, R. (1990), Language Learning Strategies: What Every Teacher Should Know [M]. Rowley, Mass.: Newbury House.