Abstract
The ability to extract words from fluent speech is crucial for language learning. Infants use environmental information to aid in this process. Baby sign is a popular trend that may aid an infant in segmenting the speech stream and extracting words. A study designed to test the effects of baby sign to aid infants in extracting words from the speech stream was conducted. Six-month-old infants were shown videos of passages where either the speaker's face, hands (sign only), or both (face and signs) were visible. A head-turn preference procedure was used to test infants' ability to identify familiarised nonsense words versus control nonsense words. The resulting data are the first to demonstrate that prior exposure to baby sign can aid an infant in extracting unfamiliar words from fluent speech and six-month-old infants can use a speaker's face as a cue to extract words from speech.
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