初始平均话语长度可预测两种语法治疗方法对特定语言障碍学龄前儿童的相对疗效。
Initial mean length of utterance predicts the relative efficacy of two grammatical treatments in preschoolers with specific language impairment.
机构信息
Vanderbilt University, Nashville, TN, USA.
出版信息
J Speech Lang Hear Res. 2011 Aug;54(4):1170-81. doi: 10.1044/1092-4388(2010/09-0246). Epub 2011 Mar 8.
PURPOSE
We sought to confirm predictions based on past findings that pretreatment mean length of utterance (MLU) would predict which of 2 grammatical treatments would best facilitate generalized and maintained grammatical development in preschoolers with specific language impairment (SLI).
METHOD
The participants were 57 preschoolers with SLI. A randomized group experiment was used. The 2 grammatical treatments were broad target recasts (BTR) and milieu language teaching (MLT). MLU was assessed at Time 1 in 2 conversational language samples. Growth rate of productive grammar was quantified using growth curve modeling on the Index of Productive Syntax (IPSyn) from 2 conversational language samples at each of 6 measurement periods.
RESULTS
Predictions were confirmed for children with initially low MLU but not for children with initially high MLUs. MLT facilitated growth of grammar better than BTR in children who were initially in Brown's stage I. Effects maintained 5 months after treatment ended.
目的
我们旨在证实过去研究结果的预测，即治疗前平均话语长度（MLU）将预测哪种语法治疗最能促进有特定语言障碍（SLI）的学龄前儿童的语法发展的泛化和维持。
方法
参与者为 57 名有 SLI 的学龄前儿童。采用随机分组实验。两种语法治疗方法为广泛目标重铸（BTR）和环境语言教学（MLT）。在 2 个会话语言样本中，在时间 1 时评估 MLU。使用生长曲线模型，根据 6 个测量期的 2 个会话语言样本中的生产语法指数（IPSyn），量化生产语法的增长率。
结果
对于初始 MLU 较低的儿童，预测得到了证实，但对于初始 MLU 较高的儿童，预测则没有得到证实。在初始处于 Brown 阶段 I 的儿童中，MLT 比 BTR 更有利于语法的增长。治疗结束后 5 个月，效果仍能维持。
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