Event-related potentials during word mapping to object shape predict toddlers' vocabulary size
Event-related potentials during word mapping to object shape predict toddlers' vocabulary size
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DOI：
10.3389/fpsyg.2015.00143
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发表时间：
2015-02-13
影响因子：
3.8
通讯作者：
Lindgren, Magnus
中科院分区：
文献类型：
--
作者：
Borgstrom, Kristina;Torkildsen, Janne von Koss;Lindgren, Magnus
注意不同的对象属性在早期词汇发展中起到了什么作用？这项纵向研究使用事件相关电位并结合行为测量，考察了20个月和24个月大的婴儿(n=38；n=34；重叠n=24)在词-物映射中使用物体形状和物体部分信息的能力。N400成分被用来测量包含形状或细节信息的图像的语义启动。在20个月时，以物体形状启动的N400到单词在地形和幅度上的差异取决于词汇量，这些差异预测了24个月时的产出性词汇量。在24个月时，当大多数儿童拥有数百个单词的词汇量时，词汇量与形状背景下的N400效应之间的关系较弱。无论年龄大小或词汇量大小，分离的宾语部分都不能起到词素的作用，尽管这些部分客体在行为上被识别出来。然而，行为测量也显示，与形状对象相比，对部分对象的识别相对较差。这三个发现为形状识别与早期词汇发展之间的联系提供了新的支持。
What role does attention to different object properties play in early vocabulary development? This longitudinal study using event-related potentials in combination with behavioral measures investigated 20- and 24-month-olds' (n=38; n=34; overlapping n=24) ability to use object shape and object part information in word-object mapping. The N400 component was used to measure semantic priming by images containing shape or detail information. At 20 months, the N400 to words primed by object shape varied in topography and amplitude depending on vocabulary size, and these differences predicted productive vocabulary size at 24 months. At 24 months, when most of the children had vocabularies of several hundred words, the relation between vocabulary size and the N400 effect in a shape context was weaker. Detached object parts did not function as word primes regardless of age or vocabulary size, although the part-objects were identified behaviorally. The behavioral measure, however, also showed relatively poor recognition of the part-objects compared to the shape-objects. These three findings provide new support for the link between shape recognition and early vocabulary development.