A Sociolinguistic Investigation of Code Switching in Bilinguals

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In the emerging research area of bilingualism, I first compiled a list of basic literature according to the field and subject in bilingual studies, and completed a bilingual lexicon of technical terms. The completion of the Japanese translation of C.Baker's book is expected to contribute to the eatablishment of bilingual studies in Japan.I was engaged in field work in Canada and Wales with special reference to societal bilingualism and bilingual education. In Japan, too, visits to immersion schools provided me with opportunities to collect raw data of code switching (CS), which in turn led me to investigate the mechanism of the bilingual brain.The CS data obtained from the above-mentioned field work were further supplemented by interviews and questionnaires. The materials were analyzed according to the pragmatic motivation, and were classified into the linguistic, societal, and psychological factors. On the basis of such analyzes, an investigation was made into the cognitive and affective domains of bilingualism, with a view to establishing a "CS grammar."The above findings in bilingualism and CS have been made public in the form of articles and oral presentations.