Peter Varghese, Kalashnikova Marina, Burnham Denis
MARCS Institute for Brain, Behaviour and Development, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
Dev Cogn Neurosci. 2016 Jun;19:152-63. doi: 10.1016/j.dcn.2016.03.006. Epub 2016 Mar 24.
This study aimed to investigate how children with dyslexia weight amplitude rise time (ART) and formant rise time (FRT) cues in phonetic discrimination. Passive mismatch responses (MMR) were recorded for a/ba/-/wa/contrast in a multiple deviant odd-ball paradigm to identify the neural response to cue weighting in 17 children with dyslexia and 17 age-matched control children. The deviant stimuli had either partial or full ART or FRT cues. The results showed that ART did not generate an MMR in either group, whereas both partial and full FRT cues generated MMR in control children while only full FRT cues generated MMR in children with dyslexia. These findings suggest that children, both controls and those with dyslexia, discriminate speech based on FRT cues and not ART cues. However, control children have greater sensitivity to FRT cues in speech compared to children with dyslexia.
本研究旨在调查诵读困难儿童在语音辨别中如何权衡音重振幅上升时间（ART）和共振峰上升时间（FRT）线索。在多偏差奇球范式中记录了/a/ba/-/wa/对比的被动失配反应（MMR），以确定17名诵读困难儿童和17名年龄匹配的对照儿童对线索加权的神经反应。偏差刺激具有部分或完全的ART或FRT线索。结果表明，ART在两组中均未产生MMR，而部分和完全的FRT线索在对照儿童中产生了MMR，而在诵读困难儿童中只有完全的FRT线索产生了MMR。这些发现表明，无论是对照儿童还是诵读困难儿童，都基于FRT线索而非ART线索来辨别语音。然而，与诵读困难儿童相比，对照儿童对语音中的FRT线索更敏感。
