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The dynamic interactions among nonword repetition, vocabulary size and phonological capacities in Mandarin-speaking preschoolers: A cross-sequential study
nonword repetition,receptive vocabulary,expressive vocabulary,productive phonology,
|Publication Year :||2015|
This study explored the dynamic relationship among language knowledge (i.e. vocabulary size and phonological capacities) and nonword repetition (NWR). Specifically, we proposed a three-phase working model which predicted that phonological capacities and vocabulary size might be dominating factors to NWR at different phases. Moreover, we examined the predictability of NWR to expressive vocabulary development. The study was conducted in a cross-sequential design. We recruited three cohorts of typically-developing children, respectively from the ages of 2, 3, and 4. They were followed for one year, tested at three time points, with an interval of 6 months. The children were tested with receptive vocabulary, expressive vocabulary, productive phonology, word discrimination, and NWR, which included nonce word repetition and gap word repetition. Inspection on children’s NWR revealed growth with age. However, children of the same age manifested considerable individual variation. Findings of the analyses verified that productive phonology and vocabulary knowledge played roles in children’s NWR development. Nevertheless, the extent to which they contributed to the variance in NWR was determined by the increase in vocabulary size and the nature of the stimuli. The effect of lexical knowledge was consistently found in children from age 2 to age 5, as evidenced by the vocabulary breadth effect in the age 2 and the lexicality effect in the older children. The findings indicated that children made use of existing vocabulary knowledge to support their encoding of novel sound forms. The mediation of productive phonology to NWR usually occurred after the mediation of vocabulary; however, productive phonology took over the role of determining NWR variation when children reached a certain level of vocabulary size and learned to retrieve for lexical support when encoding nonwords. The repetition of nonce words and the repetition of gap words were found to involved different processes. While the repetition of both types of nonwords was mediated by productive phonology, the repetition of nonce words was additionally supported by lexical knowledge. Based on the finding above, a revised model was developed to account for the processes involved in NWR. Furthermore, our study provided the evidence that NWR could predict children’s subsequent expressive vocabulary knowledge.
|Appears in Collections:||語言學研究所|
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