ABSTRACTThis study focuses on the development of epistemic modality, with particular attention to how French children evaluate the conditions of use for modal expressions marking certainty and uncertainty. Sixty children aged four, six and eight were shown films involving verbal interactions in which a target speaker accused another of having performed a deed. The analysis examine children's responses during a subsequent interview in which they were asked to attribute an epistemic attitude of certainty/uncertainty to the target speaker as a function of three factors: (a) whether he had witnessed the deed; (b) whether his accusation was modalized by the verbcroire(‘think/believe’); and (c) whether the accusation was true or false. The results show that the four-and six-year-olds attribute certainty more often than the eight-year-olds. This dissymmetry is accompanied by a developmental progression in children's conceptions of these modal categories, which change from a ‘realistic’ conception (mainly based on truth/falsity) at four years to an increasingly metalinguistic and relativized conception thereafter.
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