Kraus N, McGee T J, Carrell T D, Zecker S G, Nicol T G, Koch D B
Communication Sciences and Disorders, Northwestern University, Northwestern University, Evanston, IL 60208, USA.
Science. 1996 Aug 16;273(5277):971-3. doi: 10.1126/science.273.5277.971.
Children with learning problems often cannot discriminate rapid acoustic changes that occur in speech. In this study of normal children and children with learning problems, impaired behavioral discrimination of a rapid speech change (/dalpha/versus/galpha/) was correlated with diminished magnitude of an electrophysiologic measure that is not dependent on attention or a voluntary response. The ability of children with learning problems to discriminate another rapid speech change (/balpha/versus/walpha/) also was reflected in the neurophysiology. These results indicate that some children's discrimination deficits originate in the auditory pathway before conscious perception and have implications for differential diagnosis and targeted therapeutic strategies for children with learning disabilities and attention disorders.
有学习问题的儿童往往无法辨别言语中快速的声学变化。在这项针对正常儿童和有学习问题儿童的研究中，对快速言语变化（/dalpha/ 与 /galpha/）的行为辨别受损，与一种不依赖于注意力或自主反应的电生理测量幅度减小相关。有学习问题的儿童辨别另一种快速言语变化（/balpha/ 与 /walpha/）的能力也在神经生理学中得到体现。这些结果表明，一些儿童的辨别缺陷源于有意识感知之前的听觉通路，这对学习障碍和注意力障碍儿童的鉴别诊断及针对性治疗策略具有启示意义。
