Hartikainen Kaisa M, Ogawa Keith H, Knight Robert T
Department of Psychology and Helen Wills Neuroscience Institute, University of California, Berkeley, USA.
Neuroreport. 2010 Mar 31;21(5):344-8. doi: 10.1097/WNR.0b013e328336eeb3.
Whether emotional distracters call for attentional resources has been discussed in several studies. We have earlier shown that brief unpleasant distracters captured right hemisphere (RH) attentional resources as evidenced with reduced event-related potential responses and increased reaction times to nonemotional left visual field/RH targets. The aim of this study was to investigate whether emotional distracters selectively interfere with processes predominantly relying on the RH such as processing global visual features. Evoked potentials were recorded from 18 participants carrying out a visual discrimination task engaging global RH and local left hemisphere-dependent processes. Unpleasant distracters reduced global target detection-related right parietal activity. We conclude that brief unpleasant distracters compete for RH attentional resources with global level processing.
情绪干扰因素是否需要注意力资源已在多项研究中得到探讨。我们之前已经表明，短暂的不愉快干扰因素会占用右半球（RH）的注意力资源，这可通过事件相关电位反应减少以及对非情绪性左视野/RH目标的反应时间增加得到证明。本研究的目的是调查情绪干扰因素是否会选择性地干扰主要依赖于RH的过程，例如处理全局视觉特征。对18名参与者进行视觉辨别任务时记录诱发电位，该任务涉及全局RH和局部依赖左半球的过程。不愉快干扰因素减少了与全局目标检测相关的右顶叶活动。我们得出结论，短暂的不愉快干扰因素会与全局水平处理争夺RH的注意力资源。
