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Speech acquisition or early language acquisition focuses on the development of spoken language by a child. While grammatical and syntactic learning can be seen as a part of language acquisition, speech acquisition focuses on the development of speech perception and speech production over the first years of a child's lifetime. == Development of speech perception == Sensory learning concerning acoustic speech signals already starts during pregnancy. The newborn is already capable of discerning many phonetic contrasts. This capability may be innate. Speech perception becomes language-specific for vowels at around 6 months, for sound combinations at around 9 months and for language-specific consonants at around 11 months. It is also important that a newborn is already capable of detecting typical word stress patterns around the age of 8 months. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Speech acquisition」の詳細全文を読む スポンサード リンク
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