Hermann H T, Sonnabend N L, Zeevi Y Y
Cortex. 1986 Sep;22(3):337-58. doi: 10.1016/s0010-9452(86)80001-6.
Developmental dyslexics (DDs) and 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 of eccentricity. Tested with unihemifield stimuli, all subjects showed normal saccadic latencies and trajectories. In response to SSBS, all GRs had pronounced directional preference, choosing largely to track one side over the other. In contrast, DDs showed reduced laterality bias (p less than .025). DDs exhibited also significantly longer response latencies to SSBS than to unihemifield stimulation (p less than .01) and differed significantly from GRs (p less than .05).
对发育性阅读障碍者（DDs）和优秀阅读者（GRs）进行了半球间协调能力的测试。在测试前，所有受试者（年龄在16至47岁之间）均表现出正常的眼球运动控制能力和视力。受试者被要求追踪三种不同的点光源模式（一个半视野中的单个刺激、一个半视野中的双刺激以及一对同时出现的、对称的、双侧半视野刺激[SSBS]），这些模式以随机顺序呈现，并水平排列在±5、±10和±15度的偏心率位置。在单半视野刺激测试中，所有受试者的扫视潜伏期和轨迹均正常。在对SSBS的反应中，所有GRs都有明显的方向偏好，大多选择追踪一侧而非另一侧。相比之下，DDs表现出较弱的偏侧性偏差（p小于0.025）。DDs对SSBS的反应潜伏期也明显长于对单半视野刺激的反应潜伏期（p小于0.01），且与GRs有显著差异（p小于0.05）。
