Additive Effects of Lengthening on the Utterance-Final Word in Child-Directed Speech

作者：Ko Eon Suk^*; Soderstrom Melanie

来源：Journal of Speech, Language, and Hearing Research, 2013, 56(1): 364-371.

DOI：10.1044/1092-4388(2012/11-0341)

• child-directed speech
• duration
• focus
• utterance-final lengthening
• prosodic bootstrapping
• prosody
• mothers
• speech production
• children
• speech perception

Purpose: The authors investigated lengthening effects in child-directed speech (CDS) across the sentence, testing the additive effects on duration of Word Position, Register, Focus, and Sentence Mode (statement/question). %26lt;br%26gt;Method: Five theater students produced 6 sentences containing 5 monosyllabic words in a simulated dialogue, varying in Register, Focus, and Sentence Mode. The authors segmented a total of 1,800 sentences using forced-alignment tools, and they analyzed the duration of each word. %26lt;br%26gt;Results: The results show significant effects of Register, Word Position, and their interactions. The simple effect of Register was significant in all 5 word positions, indicating a global elongation effect in CDS. Interestingly, there was no proportional increase of the final word in CDS. In addition, the 3-way interactions Register x Word Position x Focus and Register x Word Position x Sentence Mode were significant, which converge to the conclusion that the utterance-final word in CDS is additively elongated when it is focused and in a statement. %26lt;br%26gt;Conclusion: Elongation in CDS is a global effect, but the additive effects of duration demonstrated in the authors%26apos; data suggest that the effect of enhanced utterance-final lengthening in CDS in naturalistic samples may be a by-product of discourse characteristics of CDS.

• 出版日期2013-2-1