Samar V J
Brain Cogn. 1983 Oct;2(4):383-403. doi: 10.1016/0278-2626(83)90020-9.
Twelve congenitally deaf subjects participated in a visual half-field experiment under two conditions, lexical decision and line orientation discrimination. Reaction time, accuracy, and evoked potentials from left and right temporo-parietal sites were simultaneously obtained. The evoked potential data were analyzed using a principal components analysis followed by analysis of variance and multiple regression. Both the visual half-field and the evoked potential data produced evidence of task-dependent cerebral asymmetries. Individual differences in visual half-field asymmetries in accuracy and individual scores on three cognitive paper and pencil tests were strongly predicted by linear combinations of several independent hemispheric asymmetry variables derived from evoked potential component scores. The results suggest that cerebral specialization in congenitally deaf people is a complex, multidimensional phenomenon, and provide the first evidence for a direct relationship between cerebral asymmetry and cognitive performance in this population.
12名先天性失聪受试者在词汇判断和线条方向辨别这两种条件下参与了一项视觉半视野实验。同时获取了反应时间、准确率以及左右颞顶叶部位的诱发电位。使用主成分分析，随后进行方差分析和多元回归对诱发电位数据进行分析。视觉半视野和诱发电位数据均产生了任务依赖型脑不对称的证据。通过从诱发电位成分得分中得出的几个独立半球不对称变量的线性组合，强烈预测了准确率方面视觉半视野不对称的个体差异以及三项认知纸笔测试的个体得分。结果表明，先天性失聪人群的大脑特化是一个复杂的多维度现象，并为该人群中脑不对称与认知表现之间的直接关系提供了首个证据。
