Keefe B, Swinney D
Cortex. 1979 Sep;15(3):471-81. doi: 10.1016/s0010-9452(79)80071-4.
Hemispheric specialization for linguistic material was compared for normal and dyslexic subjects under dichotic listening (Experiment 1) and hemi-retinal presentation (Experiment 2) conditions. In both experiments, group data indicated that dyslexic subjects were, overall, less accurate in their performance than normals but that both groups showed similar right ear/visual field superiority. However, examination of individual subjects scores in both experiments indicated that the distribution of lateralization scores for dyslexic subjects was bimodal, whereas that for normal subjects was unimodal. These results suggest that the dyslexic 'population' is heterogeneous with regard to cerebral lateralization and that previous work treating it as homogeneous is most likely misleading. It appears important to both carefully examine individual subject data in such studies and to consider the consequences of there being different types of cerebral lateralization etiologies for what has been typically considered to be a homogeneous dyslexic population.
在双耳分听（实验1）和半视网膜呈现（实验2）条件下，对正常受试者和阅读障碍受试者的语言材料半球特化进行了比较。在这两个实验中，分组数据表明，总体而言，阅读障碍受试者的表现不如正常受试者准确，但两组都表现出相似的右耳/视野优势。然而，对两个实验中个体受试者分数的检查表明，阅读障碍受试者的偏侧化分数分布是双峰的，而正常受试者的分布是单峰的。这些结果表明，阅读障碍“群体”在大脑偏侧化方面是异质的，之前将其视为同质群体的研究很可能会产生误导。在这类研究中仔细检查个体受试者的数据，以及考虑对于通常被认为是同质的阅读障碍群体而言存在不同类型大脑偏侧化病因的后果，似乎都很重要。
