What Does The Child Say? An Analysis Of Noun an Verb Usage Between Child and Parent

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Early language learning is one of many critical and complex skills children learn to develop during their young age (Kuhl, 2012). A distinctive fea- ture of early language learning is the lexical explosion known as the noun bias. However, opinions about whether the noun bias is truly a bias and if it is universal across languages di erentiates among researchers. Alternatively, children could pattern-match relative frequency of nouns, but also verbs from their received child-directed speech (CDS), without any bias that goes be- yond their input. This paper, leverages CDS in CHILDES to determine whether relative noun and verb similarity existed between a child's produced speech and their parents' CDS on basis of noun-to-verb ratios and word type distributions. A comparison of parent and child word distributions exhibited signi cant di erences in 24 out of 45 age bins for noun usage and 4 out of 41 age bins for verb usage, where each age bin contained conversation data of children at a speci c 3-month age interval. Found results indicated that, especially at early and later ages, English-speaking children more often dif- ferentiate in noun usage than in their verb usage. Furthermore, noun-to-verb ratios of CDS and its corresponding child speech became progressively more correlated during the course of the child's early to mid-early age (between 19 and 64 months).
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