Smith Austen K, Szelest Izabela, Friedrich Trista E, Elias Lorin J
a Department of Psychology , University of Saskatchewan , Saskatoon , SK , Canada.
Laterality. 2015;20(4):418-33. doi: 10.1080/1357650X.2014.990975. Epub 2014 Dec 24.
Although neurologically normal individuals often exhibit leftward biases of perception and attention, known as pseudoneglect, factors such as lighting, spatial location and native reading direction have been found to modulate these biases. To investigate lighting and spatial biases in left-to-right and right-to-left readers search times were measured in a target finding task where lighting and target locations were manipulated. Target search times under upper-left lighting were significantly shorter than lower-left, upper-right and lower-right lighting among left-to-right readers. Right-to-left readers did not display the same leftward bias, even displaying significantly shorter search times under upper-right lighting than those of left-to-right readers. Significantly shorter search times for targets located in the upper-left quadrant (compared to other quadrants) were observed for left-to-right readers, while search times for upper-right located targets were significantly shorter for right-to-left readers compared to those of left-to-right readers. Participant scan times of stimuli divided into equal quadrants were monitored by an eye-tracking camera. Both groups displayed greater scan times in upper quadrants. These findings suggest that native reading direction modulates spatial and light perception biases resulting in weaker leftward, or a lack of lateral biases among right-to-left readers.
尽管神经功能正常的个体常常表现出感知和注意力的向左偏向，即所谓的假性忽视，但已发现诸如光照、空间位置和母语阅读方向等因素会调节这些偏向。为了研究从左到右阅读者和从右到左阅读者的光照和空间偏向，在一个目标寻找任务中测量了搜索时间，其中光照和目标位置是被操控的。在从左到右阅读者中，左上角光照下的目标搜索时间显著短于左下角、右上角和右下角光照下的搜索时间。从右到左阅读者没有表现出同样的向左偏向，甚至在右上角光照下的搜索时间显著短于从左到右阅读者。对于从左到右阅读者，观察到位于左上角象限的目标的搜索时间显著短于其他象限；而对于从右到左阅读者，位于右上角的目标的搜索时间相比于从左到右阅读者显著更短。通过眼动追踪摄像头监测参与者对划分为相等象限的刺激的扫描时间。两组在上方象限都表现出更长的扫描时间。这些发现表明，母语阅读方向调节空间和光感知偏向，导致从右到左阅读者的向左偏向较弱或缺乏横向偏向。
