PDF(Pubmed)
Abstract：
Changes in word production occur across the lifespan. Previous studies have shown electrophysiological, temporal, and functional differences between children and adults accompanying behavioral changes in picture-naming tasks (Laganaro, Tzieropoulos, Fraunfelder, & Zesiger, 2015). Thus, a shift toward adult-like processes in referential word production occurs somewhere between the ages of 13 and 20. Our aim was to investigate when and how children develop adult-like behavior and brain activation in word production. Toward this aim, performance and event-related potentials (ERP) in a referential word production task were recorded and compared for two groups of adolescents (aged 14 to 16 and 17 to 18), children (aged 10 to 13), and young adults (aged 20 to 30). Both groups of adolescents displayed adult-like production latencies, which were longer only for children, while accuracy was lower in the younger adolescents and in children, compared to adults. ERP waveform analysis and topographic pattern analysis revealed significant intergroup differences in key time-windows on stimulus-locked ERPs, both early (150-220 ms)-associated with pre-linguistic processes-and late (280-330 ms)-associated with lexical processes. The results indicate that brain activation underlying referential word production is completely adult-like in 17-year-old adolescents, whereas an intermediate pattern is still observed in adolescents aged 14 to 16 years old, although their production speed, but not their accuracy, is already adult-like.
摘要：
单词产生的变化会在整个生命周期中发生。以前的研究表明，电生理，temporal,以及伴随着图片命名任务中行为变化的儿童和成人之间的功能差异(Laganaro，Tzieropoulos,Fraunfelder,&Zesiger,2015).因此，在13岁到20岁之间，出现了向参考词产生中的成人样过程的转变。我们的目的是调查儿童何时以及如何在单词产生中发展成人样行为和大脑激活。为了这个目标，记录并比较两组青少年（14至16岁和17至18岁）在参考单词产生任务中的表现和事件相关电位（ERP），儿童（10至13岁），和年轻人（20至30岁）。两组青少年都表现出成人般的生产延迟，只对孩子们来说更长，虽然年轻人和儿童的准确性较低，与成年人相比。ERP波形分析和地形图分析显示，在刺激锁定的ERP上，关键时间窗口存在显着组间差异。早期（150-220ms）与语言前过程相关，晚期（280-330ms）与词汇过程相关。结果表明，在17岁的青少年中，参考词产生的潜在大脑激活完全像成人一样，尽管在14至16岁的青少年中仍然观察到中间模式，虽然他们的生产速度，但不是他们的准确性，已经像成年人一样了。
