Nuthmann Antje, Kliegl Reinhold
Department of Psychology, University of Edinburgh, Edinburgh, UK.
J Vis. 2009 May 29;9(5):31.1-28. doi: 10.1167/9.5.31.
Binocular eye movements of normal adult readers were examined as they read single sentences. Analyses of horizontal and vertical fixation disparities indicated that the most prevalent type of disparate fixation is crossed (i.e., the left eye is located further to the right than the right eye) while the left eye frequently fixates somewhat above the right eye. The Gaussian distribution of the binocular fixation point peaked 2.6 cm in front of the plane of text, reflecting the prevalence of horizontally crossed fixations. Fixation disparity accumulates during the course of successive saccades and fixations within a line of text, but only to an extent that does not compromise single binocular vision. In reading, the version and vergence system interact in a way that is qualitatively similar to what has been observed in simple nonreading tasks. Finally, results presented here render it unlikely that vergence movements in reading aim at realigning the eyes at a given saccade target word.
研究人员对正常成年读者阅读单句时的双眼眼动进行了检查。对水平和垂直注视差异的分析表明，最常见的差异注视类型是交叉性的（即左眼比右眼更偏右），而左眼经常比右眼稍高一些。双眼注视点的高斯分布在文本平面之前2.6厘米处达到峰值，反映了水平交叉注视的普遍性。在一行文本中连续扫视和注视的过程中，注视差异会累积，但仅在不影响双眼单视的程度内。在阅读过程中，版本和聚散系统的相互作用方式在性质上与简单的非阅读任务中观察到的情况相似。最后，此处呈现的结果表明，阅读中的聚散运动不太可能旨在使眼睛在给定的扫视目标词处重新对齐。
