Frances Fuchs Schachter, Kathryn Kirshner, Bonnie Klips, Martha Friedricks, Karin Sanders, Courtney B. Cazden, Lois Bloom, Everyday Preschool Interpersonal Speech Usage: Methodological, Developmental, and Sociolinguistic Studies, Monographs of the Society for Research in Child Development, Vol. 39, No. 3, Everyday Preschool Interpersonal Speech Usage: Methodological, Developmental, and Sociolinguistic Studies (Sep., 1974), pp. 1-88
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Schachter et al. (1974) studied this question.
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