Govindarajan Krithika, Paradis Johanne
University of Alberta, Canada.
University of Alberta, Canada.
J Commun Disord. 2019 Jan-Feb;77:1-16. doi: 10.1016/j.jcomdis.2018.10.001. Epub 2018 Oct 10.
The narrative abilities of bilinguals with TD and with DLD/SLI in their English L2 were examined in order to 1) identify the narrative components that differentiate these two groups and 2) determine the role of age and input factors in predicting L2 narrative abilities in each group.
Participants were 24 English L2 children with DLD and 63 English L2 children with TD, matched on age (mean = 5; 8) and length of exposure to the L2 (mean = 24 months). Narrative samples were elicited using a story generation task and a parent questionnaire provided age and input variables.
Bilinguals with DLD had significantly lower scores for story grammar than their TD peers, but showed similar scores for narrative microstructure components. Length of L2 exposure in school and richness of the L2 environment predicted better narrative abilities for the group with TD but not with DLD. Older age predicted better narrative abilities for the group with DLD but not with TD. Quantity of L2 input/output at home did not predict story grammar or microstructure abilities in either group.
Story grammar might differentiate between children with TD and DLD better than microstructure among bilinguals with less exposure to the L2 and when a story generation task is used. Bilinguals with TD make more efficient use of L2 input than bilinguals with DLD.
研究患有典型发展性语言障碍（TD）和发育性语言障碍/特定语言障碍（DLD/SLI）的双语者在其二语英语中的叙事能力，以便1）确定区分这两组的叙事成分，以及2）确定年龄和输入因素在预测每组二语叙事能力中的作用。
参与者为24名患有DLD的英语二语儿童和63名患有TD的英语二语儿童，他们在年龄（平均=5岁8个月）和二语接触时长（平均=24个月）上相匹配。使用故事生成任务引出叙事样本，并通过家长问卷提供年龄和输入变量。
患有DLD的双语者在故事语法方面的得分显著低于其TD同龄人，但在叙事微观结构成分方面得分相似。在学校的二语接触时长和二语环境的丰富程度预测了患有TD的组有更好的叙事能力，但对患有DLD的组则不然。年龄较大预测了患有DLD的组有更好的叙事能力，但对患有TD的组则不然。在家中进行的二语输入/输出量在两组中均未预测故事语法或微观结构能力。
在二语接触较少且使用故事生成任务的双语者中，故事语法可能比微观结构更能区分患有TD和DLD的儿童。患有TD的双语者比患有DLD的双语者更有效地利用二语输入。
