Di Lollo Vincent, Hanson Dawn, McIntyre John S
U Alberta, Edmonton, Canada.
J Exp Psychol Hum Percept Perform. 1983 Dec;9(6):923-935. doi: 10.1037/0096-1523.9.6.923.
Four experimental tasks were employed to explore the initial stages of visual information processing in a group of dyslexic boys and in a group of normal control subjects ranging in age from 8 to 14 years. Two tasks involved visual backward masking; the other two were temporal integration tasks. The backward-masking tasks yielded evidence of slower rates of visual information processing in dyslexic children; the temporal-integration tasks yielded evidence of longer duration of visible persistence in dyslexic children. This effect was most evident in situations in which sequential stimuli impinged on the same retinal location. Some age trends in the development of these effects are noted. It is suggested that the dyslexic visual system may take an unusually long period of time to recover from the aftereffects of neural activity evoked by an inducing stimulus.
采用四项实验任务，探究了一组8至14岁的诵读困难男孩和一组正常对照受试者视觉信息处理的初始阶段。两项任务涉及视觉逆向掩蔽；另外两项是时间整合任务。逆向掩蔽任务显示诵读困难儿童的视觉信息处理速度较慢；时间整合任务显示诵读困难儿童的可见持续时间较长。这种效应在连续刺激作用于同一视网膜位置的情况下最为明显。文中还指出了这些效应发展中的一些年龄趋势。研究表明，诵读困难的视觉系统可能需要异常长的时间才能从诱导刺激引发的神经活动后效应中恢复过来。
