Center for Space Research Man/Vehicle Lab, Massachusetts Institute of Technology, Cambridge, Massachusetts.
Ann Dyslexia. 1986 Jan;36(1):154-75. doi: 10.1007/BF02648027.
Orton (1936) observed that dyslexic readers display not only obvious linguistic processing errors, but also diminished lateralized specialization of other cerebral hemispheric functions. To explore his "intergrading" hypothesis, six developmental dyslexics (DDs) and a group of good readers (GRs) were tested on measures of interhemispheric coordination. All subjects (ages 16 to 47) demonstrated normal oculomotor control and visual acuity prior to testing. Subjects were instructed to track three different point-light source patterns, (single stimulus in one hemifield, dual stimuli in one hemifield and a pair of simultaneous, symmetric, bihemifield stimuli [SSBS]), presented in random sequence and arrayed horizontally at ±5, ±10, and ±15 degrees eccentricity. Tested with unihemifield stimuli, all subjects showed normal saccadic latencies and trajectories. In response to SSBS, all GRs showed pronounced directional preference, choosing largely to track one side over the other. DDs showed reduced laterality bias (p<.025). DDs showed significantly longer response latencies to SSBS than to unihemifield stimulation (p<.01) and differed significantly from GRs (p<.05).
奥顿（1936）观察到，阅读障碍者不仅表现出明显的语言处理错误，而且大脑半球其他功能的偏侧化专门化程度也降低。为了探究他的“整合”假说，对六名发展性阅读障碍者（DD）和一组优秀阅读者（GR）进行了大脑两半球协调的测试。所有受试者（年龄 16 至 47 岁）在测试前均表现出正常的眼球运动控制和视力。受试者被指示追踪三个不同的点光源模式（一个视野中的单个刺激，一个视野中的两个刺激和一对同时、对称的双视野刺激[SSBS]），随机序列和水平排列在±5、±10 和±15 度的偏心率处。用单视野刺激测试时，所有受试者的眼跳潜伏期和轨迹均正常。对 SSBS 的反应，所有 GR 都表现出明显的方向偏好，大多选择跟踪一侧而不是另一侧。DD 的偏侧性偏差较小（p<.025）。DD 对 SSBS 的反应潜伏期明显长于单视野刺激（p<.01），且与 GR 明显不同（p<.05）。
