Departament de Psicologia Bàsica, Facultat de Psicologia, Universitat de Barcelona and Institute for Brain, Cognition and Behaviour (IR3C), Barcelona, Spain.
J Child Lang. 2013 Jun;40(3):687-700. doi: 10.1017/S0305000912000189. Epub 2012 Jul 9.
Speech perception involves the integration of auditory and visual articulatory information, and thus requires the perception of temporal synchrony between this information. There is evidence that children with specific language impairment (SLI) have difficulty with auditory speech perception but it is not known if this is also true for the integration of auditory and visual speech. Twenty Spanish-speaking children with SLI, twenty typically developing age-matched Spanish-speaking children, and twenty Spanish-speaking children matched for MLU-w participated in an eye-tracking study to investigate the perception of audiovisual speech synchrony. Results revealed that children with typical language development perceived an audiovisual asynchrony of 666 ms regardless of whether the auditory or visual speech attribute led the other one. Children with SLI only detected the 666 ms asynchrony when the auditory component preceded [corrected] the visual component. None of the groups perceived an audiovisual asynchrony of 366 ms. These results suggest that the difficulty of speech processing by children with SLI would also involve difficulties in integrating auditory and visual aspects of speech perception.
言语感知涉及听觉和视觉发音信息的整合，因此需要感知信息之间的时间同步性。有证据表明，特定语言障碍（SLI）儿童在听觉言语感知方面有困难，但对于听觉和视觉言语的整合是否也是如此还不得而知。20 名西班牙语 SLI 儿童、20 名年龄匹配的西班牙语正常发展儿童和 20 名 MLU-w 匹配的西班牙语儿童参加了一项眼动研究，以调查视听言语同步感知。结果表明，具有典型语言发展的儿童无论听觉还是视觉言语属性先于另一个，都能感知到 666 毫秒的视听异步。只有当听觉成分先于视觉成分时，SLI 儿童才能检测到 666 毫秒的异步。没有任何一个组感知到 366 毫秒的视听异步。这些结果表明，SLI 儿童的言语处理困难也会涉及到听觉和视觉言语感知方面的困难。
