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Meryl Siegal, Shigeko Okamoto, Toward Reconceptualizing the Teaching and Learning of Gendered Speech Styles in Japanese as a Foreign Language, Japanese Language and Literature, Vol. 37, No. 1, Special Issue: Sociocultural Issues in Teaching Japanese: Critical Approaches (Apr., 2003), pp. 49-66
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Siegal et al. (2003) studied this question.
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