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保護者のことばかけが子どもの言語発達を促進することは,先行研究で指摘されている.だが保護者がどのようなことばかけをしているのか把握し,それに合わせて指導を行うことは難しい.本研究では,2歳代の子どもの保護者18例に対し,共通の子どもの動画に対することばかけ課題を実施し,保護者のことばかけの傾向と,子どもの言語発達とを比較した.保護者のことばかけに含まれる形態素数,および子どもの行動や発話に対する随伴的な発話数と日本語マッカーサー乳幼児言語発達質問紙(JCDIs)の結果の関係について調べたところ,形態素数とJCDIsのすべての指標との間,および随伴的発話数とJCDIsの統語の指標との間に有意な相関がみられた.共通の動画に対する保護者のことばかけの傾向と,子どもの言語発達との間に関連がみられたことから,共通の動画に対することばかけ課題を用いて,それぞれの保護者の特徴に合わせたことばかけ指導が可能となることが考えられた.
Previous research has indicated that parental input promotes children's language development. However, it is difficult to know what kind of input the parents are using and how to provide guidance accordingly. In this study, we administered an input task to 18 parents of 2-year-old children using a common video, and compared the parental input tendencies with their children's language development. We examined the relationship between the number of morphemes in parental input and the number of parental utterances accompanying children's actions and speech, and the results of the Japanese MacArthur Communicative Developmental Inventory (JCDIs). We found significant correlations between the number of morphemes and all indicators of the JCDIs, and between the number of accompanying utterances and the syntactic index of the JCDIs. Since we found a relationship between the tendency of parental input for a common video and children's language development, we hypothesized that using an input task for a common video would enable language instruction that is tailored to the characteristics of each parent.
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