Department of Psychology, University of California, Los Angeles, Los Angeles, CA 90095-1563, USA.
Neuropsychologia. 2011 Jan;49(1):61-8. doi: 10.1016/j.neuropsychologia.2010.11.007. Epub 2010 Nov 17.
Research points to a right hemisphere bias for processing social stimuli. Hemispheric specialization for attention shifts cued by social stimuli, however, has been rarely studied. We examined the capacity of each hemisphere to orient attention in response to social and nonsocial cues using a lateralized spatial cueing paradigm. We compared the up/down orienting effects of eye gaze cues, arrow cues, and peripheral cues (change in luminance). Results revealed similar cueing effects in each visual field for nonsocial cues, but asymmetric effects for social cues. At both short (150 ms) and long (950 ms) cue-target intervals, gaze cueing was significant in the LVF, but not in the RVF. Thus, there is a right hemisphere bias for attentional orienting cued by social stimuli, but not for attentional orienting cued by nonsocial stimuli. This supports a theory of a separate neural system for socially cued orienting of attention, as well as a theory of separate parallel and simultaneous neural systems for attention in the two cerebral hemispheres.
研究指出，大脑右半球更擅长处理社会刺激。然而，针对社会刺激引发的注意转移的半球专门化研究却很少。我们使用侧化空间提示范式，研究了每个半球在响应社会和非社会线索时定向注意力的能力。我们比较了眼睛注视线索、箭头线索和外围线索（亮度变化）的上下定向效应。结果表明，对于非社会线索，每个视野都存在相似的提示效应，但对于社会线索则存在不对称的效应。在短（150 毫秒）和长（950 毫秒）提示-目标间隔内，注视线索在左视野（LVF）中显著，但在右视野（RVF）中不显著。因此，对于社会线索引导的注意力定向，存在右半球偏向，但对于非社会线索引导的注意力定向则没有。这支持了一种关于社会线索引导注意力的独立神经系统的理论，以及关于两个大脑半球注意力的独立平行和同时神经系统的理论。
