Department of Psychology, University of Turku, 20014 Turku, Finland.
Brain Cogn. 2011 Dec;77(3):391-400. doi: 10.1016/j.bandc.2011.08.019. Epub 2011 Sep 29.
Studies have suggested that supramodal attentional resources are biased rightward due to asymmetric spatial fields of the two hemispheres. This bias has been observed especially in right-handed subjects. We presented left and right-handed subjects with brief uniform grey visual stimuli in either the left or right visual hemifield. Consistent with the proposed asymmetry in attentional resources, right-handed subjects estimated right hemifield targets as having a higher contrast than physically identical stimuli presented in the left hemifield. Left-handed participants did not show a systematic rightward or leftward bias. However, the group of left-handed participants also took part in a dichotic listening experiment whose results showed that visual bias score correlated positively with ear-advantage in dichotic listening. Our results are consistent with the view that supramodal processing resources are biased towards the right hemispace, and that this bias is influenced by handedness.
研究表明，由于两个半球的空间场不对称，超模式注意资源偏向右侧。这种偏差在右撇子中尤为明显。我们向左撇子和右撇子受试者呈现短暂的均匀灰色视觉刺激，分别在左或右视野中呈现。与注意力资源的不对称性一致，右撇子受试者估计右视野目标的对比度高于在左视野中呈现的物理上相同的刺激。左撇子参与者没有表现出系统的右或左偏差。然而，左撇子参与者也参加了一项双耳分听实验，其结果表明，视觉偏差得分与双耳分听中的耳优势呈正相关。我们的结果与超模式处理资源偏向右侧空间的观点一致，这种偏差受利手性的影响。
