Asymmetries for the Visual Expression and Perception of Speech

Autor/inn/en	Nicholls, Michael E. R.; Searle, Dara A.
Titel	Asymmetries for the Visual Expression and Perception of Speech
Quelle	In: Brain and Language, 97 (2006) 3, S.322-331 (10 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0093-934X
DOI	10.1016/j.bandl.2005.11.007
Schlagwörter	Visual Perception; Articulation (Speech); Models; Correlation; Brain; Brain Hemisphere Functions; Geometric Concepts; Oral Language; Language Processing + Suchen Sie Ihr Suchwort? Visuelle Wahrnehmung; Analogiemodell; Korrelation; Gehirn; Elementare Geometrie; Oral interpretation; Mündlicher Sprachgebrauch; Sprachverarbeitung
Abstract	This study explored asymmetries for movement, expression and perception of visual speech. Sixteen dextral models were videoed as they articulated: "bat," "cat," "fat," and "sat." Measurements revealed that the right side of the mouth was opened wider and for a longer period than the left. The asymmetry was accentuated at the beginning and ends of the vocalization and was attenuated for words where the lips did not articulate the first consonant. To measure asymmetries in expressivity, 20 dextral observers watched silent videos and reported what was said. The model's mouth was covered so that the left, right or both sides were visible. Fewer errors were made when the right mouth was visible compared to the left--suggesting that the right side is more visually expressive of speech. Investigation of asymmetries in perception using mirror-reversed clips revealed that participants did not preferentially attend to one side of the speaker's face. A correlational analysis revealed an association between movement and expressivity whereby a more motile right mouth led to stronger visual expressivity of the right mouth. The asymmetries are most likely driven by left hemisphere specialization for language, which causes a rightward motoric bias. (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10