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Infant Behav Dev. 2014 Nov;37(4):644-51. doi: 10.1016/j.infbeh.2014.08.010. Epub 2014 Sep 17.

The influence of infant-directed speech on 12-month-olds' intersensory perception of fluent speech.

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Department of Developmental Psychology, Justus-Liebig-University Giessen, Germany. Electronic address:
Université Paris Descartes, Sorbonne Paris Cité, Paris, France; Laboratoire Psychologie de la Perception, CNRS UMR 8158, Paris, France.
Department of Psychology, Florida Atlantic University, Boca Raton, United States.
Laboratoire de Psychologie et Neurocognition, CNRS UMR 5105, Université Pierre Mendès France, Grenoble, France.
Department of Developmental Psychology, Justus-Liebig-University Giessen, Germany.


The present study examined whether infant-directed (ID) speech facilitates intersensory matching of audio-visual fluent speech in 12-month-old infants. German-learning infants' audio-visual matching ability of German and French fluent speech was assessed by using a variant of the intermodal matching procedure, with auditory and visual speech information presented sequentially. In Experiment 1, the sentences were spoken in an adult-directed (AD) manner. Results showed that 12-month-old infants did not exhibit a matching performance for the native, nor for the non-native language. However, Experiment 2 revealed that when ID speech stimuli were used, infants did perceive the relation between auditory and visual speech attributes, but only in response to their native language. Thus, the findings suggest that ID speech might have an influence on the intersensory perception of fluent speech and shed further light on multisensory perceptual narrowing.


Audio–visual speech perception; Infant-directed speech; Infants; Intersensory; Perceptual narrowing

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