Laasonen Marja, Service Elisabet, Virsu Veijo
Department of Psychology, University of Helsinki, Helsinki, Finland.
Brain Lang. 2002 Mar;80(3):340-54. doi: 10.1006/brln.2001.2593.
We investigated crossmodal temporal performance in processing rapid sequential nonlinguistic events in developmentally dyslexic young adults (ages 20-36 years) and an age- and IQ-matched control group in audiotactile, visuotactile, and audiovisual combinations. Two methods were used for estimating 84% correct temporal acuity thresholds: temporal order judgment (TOJ) and temporal processing acuity (TPA). TPA requires phase difference detection: the judgment of simultaneity/nonsimultaneity of brief stimuli in two parallel, spatially separate triplets. The dyslexic readers' average temporal performance was somewhat poorer in all six comparisons; in audiovisual comparisons the group differences were not statistically significant, however. A principal component analysis indicated that temporal acuity and phonological awareness are related in dyslexic readers. The impairment of temporal input processing seems to be a general correlative feature of dyslexia in children and adults, but the overlap in performance between dyslexic and normal readers suggests that it is not a sufficient reason for developmental reading difficulties.
我们研究了发育性阅读障碍的年轻成年人（年龄在20至36岁之间）以及年龄和智商匹配的对照组在处理快速连续非语言事件时的跨模态时间表现，这些事件涉及听觉-触觉、视觉-触觉和视听组合。我们使用两种方法来估计84%正确的时间敏锐度阈值：时间顺序判断（TOJ）和时间处理敏锐度（TPA）。TPA需要相位差检测：判断两个平行、空间分离的三联体中短暂刺激的同时性/非同时性。在所有六项比较中，阅读障碍读者的平均时间表现略差；然而，在视听比较中，两组差异无统计学意义。主成分分析表明，阅读障碍读者的时间敏锐度和语音意识相关。时间输入处理的损伤似乎是儿童和成人阅读障碍的一个普遍相关特征，但阅读障碍读者和正常读者在表现上的重叠表明，这并不是导致发育性阅读困难的充分原因。
