The influence of temporal asynchrony on character-speech integration in Chinese children with and without dyslexia: An ERP study

Ying-Chun Du; Yi-Zhen Li; Li Qin; Hong-Yan Bi

doi:10.1016/j.bandl.2022.105175

The influence of temporal asynchrony on character-speech integration in Chinese children with and without dyslexia: An ERP study

Brain Lang. 2022 Oct:233:105175. doi: 10.1016/j.bandl.2022.105175. Epub 2022 Aug 24.

Authors

Ying-Chun Du¹, Yi-Zhen Li¹, Li Qin¹, Hong-Yan Bi²

Affiliations

¹ CAS Key Laboratory of Behavioral Science, Center for Brain Science and Learning Difficulties, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China.
² CAS Key Laboratory of Behavioral Science, Center for Brain Science and Learning Difficulties, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: bihy@psych.ac.cn.

PMID: 36029751
DOI: 10.1016/j.bandl.2022.105175

Abstract

Dyslexic readers have been reported to show abnormal temporal acuity and multisensory integration deficiency. Here, we investigated the influence of temporal intervals on Chinese character-speech integration in children with and without dyslexia. Visual characters were presented synchronously to the onset of speech sounds (AV0) or before speech sound by 300 ms (AV300). Event-related potentials (ERP) evoked by congruent condition (speech sounds presented with congruent Chinese characters) and by baseline condition (speech sounds presented with Korean characters) were compared. Typically developing (TD) children exhibited congruency effect in AV0 condition, whereas dyslexic children exhibited congruency effect in AV300 condition. Moreover, congruency effect in TD children was due to enhanced neural activation to congruent trials, congruency effect in dyslexic children was contributed by neural suppression for baseline trials. These results suggested that different underlying mechanisms were involved in character-speech integration for typical and dyslexic children.

Keywords: Developmental dyslexia (DD); Event-related potentials (ERP); Multisensory; Orthographic-phonological integration; Temporal binding window (TBW).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Acoustic Stimulation
Child
China
Dyslexia*
Evoked Potentials / physiology
Humans
Reading
Speech
Speech Perception* / physiology