The Acquisition of Japanese as a Second Language and Processability Theory: A Longitudinal Study of a Naturalistic Child Learner.

要旨

The aim of this study was to investigate longitudinally how a child learner acquired verbal morpho-syntax in Japanese in a naturalistic second language (L2) context. Specifically the points of emergence for three verbal morpho-syntactic structures, namely verbal inflection, the V-te V structure and the passive/causative structure, were investigated within a framework of Processability Theory (PT) (Pienemann, 1998b). The subsequent development of these structures was also examined. Unlike earlier research about morpheme orders and developmental sequences in language acquisition which was criticised because of its apparent lack of theoretical underpinnings, Pienemann’s Processability Theory (PT)(1998b) connects the processability of morpho-syntactic structure to linguistic theories. Pienemann also claims that this theory can be used to explain the acquisition of a wide range of morpho-syntactic structures and that it is typologically plausible and applicable to any language. In recent times PT has been extensively tested in a range of languages acquired as an L2, including German, English and Swedish (Pienemann, 1998b; Pienemann & Håkansson, 1999) and Italian and Japanese (Di Biase & Kawaguchi, 2002). The findings from these studies support this theory. Following the acquisition criteria proposed by Pienemann (1998b), the current study analyses the points of emergence of verbal morpho-syntactic structures by a seven year old Australian boy who was acquiring Japanese as a second language (JSL) naturalistically. Data were collected through audio taping approximately 90 minute interactions between the child and other Japanese speakers at each of the 26 sessions over a one-year and nine month period. The task-based elicitation method was used to create as spontaneous interaction as possible between the child and his interlocutors.

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