Appel, G., & Lantolf, J. P. (1994). Speaking as mediation: A study of L1 and L2 text recall tasks. Modern Language Journal, 78, 437-452.
Berk, L. E. (1994). Why children talk to themselves. Scientific American, 271(5), 78-83.
Borer, L. (2006). Speaking to the self and to others: The role of private and social speech in the retention of second language vocabulary by adult academic learners. Unpublished doctoral dissertation, University of Toronto, Toronto, Ontario.
Centeno-Cortes, B., & Jimenez, A. F. (2004). Problem-solving tasks in a foreign language: The importance of the L1 in private verbal thinking. International Journal of Applied Linguistics, 14(1), 7-35.
Cook, V. (2008). Second language learning and language teaching. London: Arnold.
Feigenbaum, P. (1992). Development of the syntactic and discourse structures of private speech. In R. M. Diaz and L. E. Berk (Eds.), Private speech: From social interaction to selfregulation (pp. 181-198). Hillsdale, NJ: Erlbaum.
Frederick, J., & Dicamill, M. A. (2004). Private speech: a study of language for thought in the collaborative interaction of language learners. International journal of applied linguistics, 14(1), 36-69.
Lantolf, J. P. (2000). Sociocultural theory and second language learning. Oxford: Oxford University Press.
Lantolf, J. P. (2003). Intrapersonal communication and internalization in the second language classroom. In A. Kozulin, V. S. Ageev, S. Miller & B. Gindis. (Eds.), Vygotsky's Educational Theory in Cultural Context. (pp. 349-370). Cambridge, Cambridge University Press.
Lantolf, J. P. (2006). Sociocultural theory and L2: State of the art. Studies in Second Language Acquisition, 28 (1), 67-109.
Lantolf, J. P. (2007). Sociocultural Theory: A unified approach to L2 learning and teaching .In J. Cummins & C. Davison.(eds.), International handbook of English language teaching, Springer Science Business Media, LLC, NY, 693-701.
Lantolf, J. P. & Frawley, W. (1985). On communication strategies: A functional perspective. Rassegna Italiana Di Linguistica Applicata Estratto Dal, 17, 143-157
Lantolf, J. P., & Thorne, S. (2007). Sociocultural theory and second language acquisition. In. B. van Patten & J. Williams (eds.), Theories in second language acquisition (pp. 201-224): Mahwah, NJ: Lawrence Erlbaum.
Lee, J. (2008). Gesture and private speech in second language acquisition. Studies in Second Language Acquisition, 30 (02), 169-190.
Liwei.(2010). Thought and language. Beijing: Beijing University Press.
McCafferty, S. G. (1990). A cross-cultural and developmental investigation of self-regulation in the private speech of Hispanic and Asian acquirers of ESL. Unpublished raw data.
McCafferty, S. G. (1994). The use of private speech by adult ESL learners at different levels of proficiency. In J. Lantolf & G. Appel, Vygotskian approaches to second language research (pp.117–34).Westport, CT: Ablex.
McCafferty, S. G. (2002). Gesture and creating zones of proximal development for second language learning. The Modern Language Journal, 86(2), 192-203.
Ohta, A. S. (2001). Second language acquisition processes in the classroom: Learning Japanese. Mahvash, N.J.: Lawrence Erlbaum.
Sonmez, S. S. (2011). A study of private speech and cognitive regulation in native nonnative speaker interactions. Unpublished doctoral dissertation, the Florida state University.
Swain, M., Huang, L. S., Barkaoui, K., Brooks, L., & Lapkin, S. (2009). The speaking section of the TOEFL iBT™ (SSTiBT): Test-takers’ reported strategic behaviors (TOEFL iBT™ Research Series No. TOEFLiBT-10). Princeton, NJ: ETS.
Vygotsky, L. S. (1986). Thought and language. Cambridge, MA: MIT Press.
Vygotsky, L. S. (1978). Mind in Society: The development of higher psychological processes. Cambridge, MA: Harvard University Press.
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