Kawai M
Shinrigaku Kenkyu. 1981 Oct;52(4):240-3.
The relation between the activation level of hemisphere and the laterality of visual detection was investigated under nonverbal loading conditions. In Exp. I, 10 (6 male and 4 female) right handed college students made "same-different" judgements for pairs of random forms (4th, 8th, and 12th polygons) serially presented. In Exp. II, another 10 (5 male and 5 female) subjects responded to similar with different association values. The main findings were as follows: (a) A test stimulus (8th polygon) was recognized more accurately in the left visual field, but this was due to the poor performance in the right visual field, (b) the factor of association value did not influence the visual field superiority, and (c) the task difficulty may be sole factor responsive to the visual field superiority. These results suggested that the visual laterality effects occurred only when the level of hemispheric loading was optimal.
在非言语负荷条件下，研究了半球激活水平与视觉检测偏侧性之间的关系。在实验一中，10名（6名男性和4名女性）右利手大学生对连续呈现的随机图形对（第4、8和12个多边形）进行“相同-不同”判断。在实验二中，另外10名（5名男性和5名女性）受试者对具有不同关联值的相似图形做出反应。主要研究结果如下：（a）测试刺激（第8个多边形）在左视野中识别得更准确，但这是由于右视野表现较差；（b）关联值因素不影响视野优势；（c）任务难度可能是影响视野优势的唯一因素。这些结果表明，视觉偏侧性效应仅在半球负荷水平最佳时出现。
