Reardon Kristin M, Kelly Jenna G, Matthews Nestor
Denison University, Department of Psychology, 100 South Road, Knapp Hall, Granville, OH 43023, USA.
Vision Res. 2009 Mar;49(7):691-701. doi: 10.1016/j.visres.2009.01.005. Epub 2009 Feb 4.
We examined interactions between and within the left and right visual hemifields using elementary visual tasks. Each trial required identifying a letter at fixation and then either discriminating the orientation of (experiment 1) or detecting (experiment 2) peripheral Gabor targets. On half the trials Gabor distracters were presented between the Gabor targets, and were either restricted to one lateral hemifield (unilateral condition) or presented across the left and right hemifields (bilateral condition). Orientation discrimination and detection each exhibited bilateral superiority only when distracters were present. The results confirm bilateral superiority in attentional selection, even on these most elementary visual tasks.
我们使用基本视觉任务研究了左右视觉半视野之间及内部的相互作用。每个试验都要求在注视点识别一个字母，然后辨别（实验1）或检测（实验2）周边的Gabor目标的方向。在一半的试验中，Gabor干扰物呈现在Gabor目标之间，并且要么限制在一个外侧半视野（单侧条件），要么呈现在左右半视野（双侧条件）。只有当存在干扰物时，方向辨别和检测才各自表现出双侧优势。这些结果证实了即使在这些最基本的视觉任务中，注意力选择也存在双侧优势。
