Semantic diversity, frequency and the development of lexical quality in children's word reading
Semantic diversity, frequency and the development of lexical quality in children's word reading
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DOI：
10.1016/j.jml.2018.08.005
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发表时间：
2018-12-01
影响因子：
4.3
通讯作者：
Nation, Kate
中科院分区：
文献类型：
--
作者：
Hsiao, Yaling;Nation, Kate
频率对词汇加工产生了强大的影响，但它可能至少有一部分影响是由高频词在更多样化的语境中经历过个人的语言经验造成的。为了捕捉这种变化，我们对一个3500万字的儿童文本语料库应用了潜在语义分析，得出了一个语义多样性的指标，该指标量化了一个词出现的所有上下文的相似性。通过对6-13岁儿童进行的三项涉及阅读和词汇判断的实验，我们发现了语义多样性的主要影响：高多样性的单词比低多样性的单词反应更快，阅读更准确。频率，文件数量和年龄的收购也显着预测阅读行为。这些结果表明，语境变异性有助于词汇学习和词汇质量的发展，而不是频率的影响。
Frequency exerts a powerful influence on lexical processing but it is possible that at least part of its effect is caused by high frequency words being experienced in more diverse contexts over an individual's language experience. To capture this variability, we applied Latent Semantic Analysis on a 35-million-word corpus of texts written for children, deriving a measure of semantic diversity that quantifies the similarity of all the contexts a word appears in. Across three experiments with 6-13-year-old children involving reading aloud and lexical decision, we found a main effect of semantic diversity: high diversity words were responded to faster and read more accurately than low diversity words. Frequency, document count and age of acquisition were also significant predictors of reading behaviour. These findings demonstrate that contextual variability contributes to word learning and the development of lexical quality, beyond the effect of frequency.