3[1]Lightbown M,Spada N.How Languages Are Learned[M].Oxford:Oxford University Press,1999.
4[2]Lenneberg E.Biological Foundations of Language[M].New York:Wiley and Sons,1967.
5[3]Chastain K.Affective and Ability Factors in Second Language Acquisition[J].Language Learning,1975,(25):153-61.
6[4]Genesee F.The Role of Intelligence in Second Language Learning[J].Language Learning,1976,(26):267-280.
7[5]McDonough S.Psychology in Foreign Language Teaching[M].London:Allen and Unwin,1981.
8[6]Ekstrand L.Social and Individual Frame Factors in Second Language Learning:Comparative Aspects' in T.Skutnabb-Kangas(ed.)[A].Papers from the First Nordic Conference on Bilingualism[Z].Helsingsfors University,1977.
9[7]Oller J,K Perkins.A Further Comment on Language Proficiency as a Source of Variance in Certain Affective Measures[J].Language Learning,1978,(28):417-23.
10[8]Cummins J.Cognitive/Academic Language Proficiency,Linguistic Independency,the Optimal Age Question and Some Other Matters[J].Working Papers on Bilingualism,1979,(19):197-205.
