Role of Object-based Attention inLeft-lateralization of Print-specific ERP
Role of Object-based Attention inLeft-lateralization of Print-specific ERP
复制标题
DOI：
10.5674/jjppp.2009oa
复制
发表时间：
2020-12
期刊：
影响因子：
--
通讯作者：
Tomoki Uno;T. Katakura;T. Kasai
中科院分区：
文献类型：
--
作者：
Tomoki Uno;T. Katakura;T. Kasai
内隐和快速转换成声音的字母熟练的读者可能反映在左侧的印刷调谐N170事件相关电位。最近的一项研究表明，N170的不对称性取决于对作为感知对象的字母的注意选择（Okumura等人，2015，Neuropsychologia）.本研究通过一个基于物体的注意的实验范式来验证这种可能性。刺激是字母（单词，非单词）或符号串，在空间上与随机点字段重叠。参与者被要求区分字母/符号串或点的颜色。左偏负打印引起在200 - 300毫秒刺激后，只有当参与者出席字符串。然而，这一效应发生晚于典型的N170潜伏期，这可能反映了解决重叠刺激之间的竞争或感知完成字母所需的时间。目前的研究是第一个证明特定于印刷品的ERP的不对称性需要选择性注意字母串。
Implicit and rapid conversion of letters into sounds by skilled readers might be reflected in the left lateralization of print-tuned N170 event-related potential. A recent study suggests that the leftward asymmetry of the N170 depends on the attentional selection of letters as perceptual objects ( Okumura et al., 2015, Neuropsychologia ) ． The present study tested this possibility by using an experimental paradigm of object-based attention. Stimuli were letters ( words, nonwords ) or symbol strings that spatially overlapped with random-dot fields. Participants were asked to discriminate the color of either the letter/symbol strings or the dots. Left-lateralized negativity for print was elicited at 200 ‒ 300 ms post-stimulus only when participants attended to the strings. However, this effect occurred later than the typical N170 latency, which might reflect the time required to resolve competition between overlapping stimuli or perceptual completion of letters. The current study is the first to demonstrate that the leftward asymmetry of print-specific ERP requires selective attention to letter strings.