University of Manchester, United Kingdom.
J Speech Lang Hear Res. 2012 Dec;55(6):1716-35. doi: 10.1044/1092-4388(2012/10-0182). Epub 2012 May 4.
To investigate the longitudinal trajectories of verbal and nonverbal skills in individuals with a history of specific language impairment (SLI) from childhood to adolescence. This study focuses on SLI only and investigates within-participant measures across abilities.
Verbal and nonverbal skills were assessed in 242 children with a history of SLI at ages 7, 8, 11, 14, 16, and 17. Discrete factor growth modeling was used to examine developmental trajectories for the whole group and to identify subgroups on the basis of a novel, developmental, multidimensional approach.
When expressive language, receptive language, and nonverbal skills were scaled to a common metric, the group of individuals with a history of SLI as a whole had stable skills growth throughout the 10-year time frame. Seven language subgroups were identified, but these differed only in severity and did not display mutually distinctive patterns of growth development. In contrast, 6 nonverbal skills subgroups were identified, and their trajectories did differ significantly, with evidence of deceleration in around one third of the sample.
Individuals with a history of SLI show steady language growth from age 7. However, different patterns of growth of nonverbal skills are observed from childhood to adolescence.
研究有特定语言障碍（SLI）病史的个体从儿童期到青春期的言语和非言语技能的纵向轨迹。本研究仅关注 SLI，并在跨能力的个体内测量中进行研究。
在 7、8、11、14、16 和 17 岁时，对 242 名有 SLI 病史的儿童进行了言语和非言语技能评估。离散因子增长模型用于检查整个组的发展轨迹，并基于新的发展多维方法确定亚组。
当将表达性语言、接受性语言和非言语技能缩放到共同度量时，整个 SLI 病史组在 10 年的时间内具有稳定的技能增长。确定了 7 个语言亚组，但这些亚组仅在严重程度上有所不同，并且没有显示出相互独特的增长发展模式。相比之下，确定了 6 个非言语技能亚组，它们的轨迹确实存在显著差异，大约三分之一的样本显示出减速的迹象。
有 SLI 病史的个体从 7 岁开始表现出稳定的语言增长。然而，从儿童期到青春期，观察到非言语技能的不同增长模式。
