Lip Movement Exaggerations during Infant-Directed Speech

Autor/inn/en	Green, Jordan R.; Nip, Ignatius S. B.; Wilson, Erin M.; Mefferd, Antje S.; Yunusova, Yana
Titel	Lip Movement Exaggerations during Infant-Directed Speech
Quelle	In: Journal of Speech, Language, and Hearing Research, 53 (2010) 6, S.1529-1542 (14 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/1092-4388(2010/09-0005)
Schlagwörter	Speech Communication; Nonverbal Communication; Vowels; Mothers; Infants; Acoustics; Literature Reviews; Second Language Learning; Comparative Analysis; Visual Aids; Language Acquisition; Learning Processes; Evaluation Methods + Suchen Sie Ihr Suchwort? Non-verbal communication; Nonverbale Kommunikation; Mother; Mutter; Infant; Toddler; Toddlers; Kleinkind; Akustik; Zweitsprachenerwerb; Anschauungsmaterial; Sprachaneignung; Spracherwerb; Learning process; Lernprozess
Abstract	Purpose: Although a growing body of literature has identified the positive effects of visual speech on speech and language learning, oral movements of infant-directed speech (IDS) have rarely been studied. This investigation used 3-dimensional motion capture technology to describe how mothers modify their lip movements when talking to their infants. Method: Lip movements were recorded from 25 mothers as they spoke to their infants and other adults. Lip shapes were analyzed for differences across speaking conditions. The maximum fundamental frequency, duration, acoustic intensity, and first and second formant frequency of each vowel also were measured. Results: Lip movements were significantly larger during IDS than during adult-directed speech, although the exaggerations were vowel specific. All of the vowels produced during IDS were characterized by an elevated vocal pitch and a slowed speaking rate when compared with vowels produced during adult-directed speech. Conclusion: The pattern of lip-shape exaggerations did not provide support for the hypothesis that mothers produce exemplar visual models of vowels during IDS. Future work is required to determine whether the observed increases in vertical lip aperture engender visual and acoustic enhancements that facilitate the early learning of speech. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10