Hogan Tiffany P, Bowles Ryan P, Catts Hugh W, Storkel Holly L
Barkley Memorial Center, University of Nebraska - Lincoln, NE 68583, United States.
J Commun Disord. 2011 Jan-Feb;44(1):49-58. doi: 10.1016/j.jcomdis.2010.07.002. Epub 2010 Jul 17.
The purpose of this study was to test the hypothesis that two lexical characteristics - neighborhood density and word frequency - interact to influence performance on phoneme awareness tasks.
Phoneme awareness was examined in a large, longitudinal dataset of 2nd and 4th grade children. Using linear logistic test model, the relation between words' neighborhood density, word frequency, and phoneme awareness performance was examined across grades while co-varying type and place of deletion.
A predicted interaction was revealed: words from dense neighborhoods or those with high frequency were more likely to yield correct phoneme awareness responses across grades.
Findings support an expansion of the lexical restructuring model to include interactions between neighborhood density and word frequency to account for phoneme awareness.
The reader will be able to (1) describe the lexical restructuring model; (2) define neighborhood density; (3) define word frequency; (4) identify how these variables interact to impact phoneme awareness performance; (5) identify ways in which future clinical practice may be impacted by the study's findings.
本研究的目的是检验以下假设：两个词汇特征——邻域密度和词频——相互作用，影响音素意识任务的表现。
在一个包含二年级和四年级儿童的大型纵向数据集中考察音素意识。使用线性逻辑测试模型，在不同年级中，同时对删除类型和位置进行协变量分析，考察单词的邻域密度、词频与音素意识表现之间的关系。
揭示了一个预测的相互作用：来自密集邻域的单词或高频单词在各年级中更有可能产生正确的音素意识反应。
研究结果支持对词汇重组模型进行扩展，将邻域密度和词频之间的相互作用纳入其中，以解释音素意识。
读者将能够（1）描述词汇重组模型；（2）定义邻域密度；（3）定义词频；（4）确定这些变量如何相互作用以影响音素意识表现；（5）确定本研究结果可能对未来临床实践产生影响的方式。
