Delimiting the Sydney speech community

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Abstract
Quantitative analyses of large data sets make use of both linguistic and sociological categories in sociolinguistic studies. While the linguistic categories are generally well-defined and there are sufficient tokens for further definition based on mathematical manipulation, the social characteristics such as socioeconomic class or ethnicity are neither. The familiar problem of grouping speakers by such sociological characteristics prior to quantitative analysis is addressed and an alternative solution – principal components analysis – is suggested. Principal components analysis is used here as a heuristic for grouping speakers solely on the basis of linguistic behaviour; the groups thus defined can then be described according to sociological characteristics. In addition, by naming the principal components, the major linguistic and social dimensions of the variation in the data can be identified. Principal components analysis was applied to vowel variation data collected as part of a sociolinguistic survey of English in Sydney, New South Wales, Australia. (Sociolinguistics, variation studies, quantitative methods in linguistics, dialectology, Australian English, role of migrants in language change)

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