Hairston W David, Burdette Jonathan H, Flowers D Lynn, Wood Frank B, Wallace Mark T
Department of Neurobiology and Anatomy, Wake Forest University Health Sciences, Winston-Salem, NC 27157, USA.
Exp Brain Res. 2005 Oct;166(3-4):474-80. doi: 10.1007/s00221-005-2387-6. Epub 2005 Jul 19.
Recent studies have demonstrated that dyslexia is associated with deficits in the temporal encoding of sensory information. While most previous studies have focused on information processing within a single sensory modality, it is clear that the deficits seen in dyslexia span multiple sensory systems. Surprisingly, although the development of linguistic proficiency involves the rapid and accurate integration of auditory and visual cues, the capacity of dyslexic individuals to integrate information between the different senses has not been systematically examined. To test this, we studied the effects of task-irrelevant auditory information on the performance of a visual temporal-order-judgment (TOJ) task. Dyslexic subjects' performance differed significantly from that of control subjects, specifically in that they integrated the auditory and visual information over longer temporal intervals. Such a result suggests an extended temporal "window" for binding visual and auditory cues in dyslexic individuals. The potential deleterious effects of this finding for rapid multisensory processes such as reading are discussed.
最近的研究表明，诵读困难与感觉信息的时间编码缺陷有关。虽然之前的大多数研究都集中在单一感觉模态内的信息处理上，但很明显，诵读困难中出现的缺陷跨越了多个感觉系统。令人惊讶的是，尽管语言能力的发展涉及听觉和视觉线索的快速准确整合，但诵读困难个体整合不同感觉之间信息的能力尚未得到系统研究。为了测试这一点，我们研究了与任务无关的听觉信息对视觉时间顺序判断（TOJ）任务表现的影响。诵读困难受试者的表现与对照组受试者有显著差异，具体表现为他们在更长的时间间隔内整合听觉和视觉信息。这样的结果表明，诵读困难个体在绑定视觉和听觉线索方面存在一个延长的时间“窗口”。本文讨论了这一发现对诸如阅读等快速多感觉过程可能产生的有害影响。
