Sadler A J, Deary I J
Department of Psychology, University of Edinburgh, Scotland, U.K.
Neuropsychologia. 1996 Apr;34(4):283-95. doi: 10.1016/0028-3932(95)00105-0.
Recent studies have suggested that there are low-level processing asymmetries across the cerebral hemispheres, with a right visual field-left hemisphere advantage in tasks involving temporal resolution. In the present report, one such task, inspection time, was measured separately for each cerebral hemisphere in 10 right-handed male subjects over 5 days. A number of methodological improvements were made on previous studies in which a general right visual field-left hemisphere advantage had been found relative to the left visual field-right hemisphere in inspection time performance. The present results suggest that there is no general left hemisphere advantage in inspection time, although there might be asymmetries in practice effects across the hemispheres. The findings also suggest the existence of individual differences in the extent and direction of hemispheric specialisation for this task (ranging from left hemisphere dominance to marked right hemisphere dominance for some subjects) even in right-handed subjects.
近期研究表明，大脑半球存在低水平加工的不对称性，在涉及时间分辨率的任务中，右视野-左半球具有优势。在本报告中，对10名右利手男性受试者，在5天时间里分别测量了每个大脑半球的一项此类任务——检查时间。相对于之前在检查时间表现方面发现的一般右视野-左半球相对于左视野-右半球的优势，本研究在方法上有多项改进。目前的结果表明，在检查时间方面不存在一般的左半球优势，尽管在半球间的练习效应上可能存在不对称性。这些发现还表明，即使在右利手受试者中，对于这项任务，半球特化的程度和方向也存在个体差异（从一些受试者的左半球优势到明显的右半球优势）。
