Hadley Pamela A, Short Heather
Department of Communicative Disorders, Northern Illinois University, DeKalb 60115, USA.
J Speech Lang Hear Res. 2005 Dec;48(6):1344-62. doi: 10.1044/1092-4388(2005/094).
The purpose of this study was to develop and evaluate measures reflecting the onset of tense marking for children between the ages of 2;0 (years;months) and 3;0.
The validity of 4 cumulative measures of tense marker emergence and productivity was evaluated relative to existing measures of early grammatical development in a sample of 20 children followed longitudinally. Fourteen children were at risk for specific language impairment (AR-SLI group), and 6 children had low average language abilities (LA group).
All measures of onset were highly correlated with the traditional measures; however, children's progress toward mastery of grammatical tense marking was best explained by the productivity of their tense marking systems. Finally, the onset measures imposing productivity requirements best differentiated children in the LA group from those in the AR-SLI group.
The clinical implications for using the late onset of tense marking to improve the early identification of SLI are discussed.
本研究旨在开发并评估反映2岁0个月至3岁0个月儿童时态标记出现情况的测量方法。
在一个纵向跟踪的20名儿童样本中，相对于现有的早期语法发展测量方法，对4种累积性的时态标记出现和产出测量方法的有效性进行了评估。14名儿童有特定语言障碍风险（AR-SLI组），6名儿童语言能力处于低平均水平（LA组）。
所有出现情况的测量方法都与传统测量方法高度相关；然而，儿童在掌握语法时态标记方面的进展，最好用其时态标记系统的产出情况来解释。最后，对产出有要求的出现情况测量方法，最能区分LA组和AR-SLI组的儿童。
讨论了利用时态标记出现较晚来改善特定语言障碍早期识别的临床意义。
