Head-free reading of horizontally and vertically arranged texts
Head-free reading of horizontally and vertically arranged texts
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DOI：
10.1016/s0042-6989(02)00063-9
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发表时间：
2002-05
期刊：
影响因子：
1.8
通讯作者：
H. Seo;Choongkil Lee
中科院分区：
文献类型：
--
作者：
H. Seo;Choongkil Lee
比较了水平和垂直排列的文本在阅读中的眼动和头部运动参数及其协调性。水平排列文本的阅读速度比垂直排列文本快24%，这主要是由于水平阅读的注视幅度较大，因此扫视和注视次数较少。水平阅读的注视扫视速度高于垂直阅读，这也是造成阅读速度差异的原因。阅读中的水平偏差至少部分是由于眼动系统，因为在没有词汇负荷的对照实验中也观察到对于给定幅度的水平扫视的较高速度，其中跟踪顺序步进的激光目标。分析的瞬时相位的眼睛和头部的运动与一个新的度量推导出的希尔伯特变换表明，眼睛和头部的耦合是更强的垂直方向比水平方向的阅读和激光跟踪任务。这些结果，结合以前的证据表明，文本熟悉度调节头部运动命令的时间和强度与眼球运动（维斯。Res. 39（1999）3761）指出，眼睛和头部运动之间的耦合强度是可变的，这取决于注视转移的方向和认知背景。
Parameters of eye and head movements and their coordination in reading horizontally and vertically arranged texts were compared. Reading was faster for horizontally arranged than for vertically arranged texts by 24%, primarily due to larger gaze amplitude for horizontal reading, and thus smaller numbers of saccades and fixations. The higher velocity of gaze saccades for given amplitudes in horizontal than vertical reading also contributed to the difference in reading speed. The horizontal bias in reading is at least partly due to the oculomotor system, because the higher velocity for given amplitude of horizontal saccade was also observed in a control experiment devoid of lexical load, in which a sequentially stepping laser target was tracked. The analysis of instantaneous phase of eye and head movements with a new metric derived by the Hilbert transform suggests that eye and head coupling is stronger for vertical than for horizontal direction in both reading and laser-tracking tasks. These results, combined with previous evidence that text familiarity modulates the timing and strength of head movement commands with respect to eye movements (Vis. Res. 39 (1999) 3761), indicate that the coupling strength between eye and head movements is variable depending on the direction of gaze shift and cognitive context.