Green Jessica J, McDonald John J
Department of Psychology, Simon Fraser University, Burnaby, British Columbia, Canada.
Psychophysiology. 2006 Mar;43(2):161-71. doi: 10.1111/j.1469-8986.2006.00394.x.
We conducted two audiovisual experiments to determine whether event-related potential (ERP) components elicited by attention-directing cues reflect supramodal attentional control. Symbolic visual cues were used to direct attention prior to auditory targets in Experiment 1, and symbolic auditory cues were used to direct attention prior to visual targets in Experiment 2. Different patterns of cue ERPs were found in the two experiments. A frontal negativity called the ADAN was absent in Experiment 2, which indicates that this component does not reflect supramodal attentional control. A posterior positivity called the LDAP was observed in both experiments but was focused more posteriorly over the occipital scalp in Experiment 2. This component appears to reflect multiple processes, including visual processes involved in location marking and target preparation as well as supramodal processes involved in attentional control.
我们进行了两项视听实验，以确定由注意力引导线索引发的事件相关电位（ERP）成分是否反映了跨模态的注意力控制。在实验1中，使用符号视觉线索在听觉目标之前引导注意力，而在实验2中，使用符号听觉线索在视觉目标之前引导注意力。在这两项实验中发现了不同的线索ERP模式。实验2中没有出现一种称为ADAN的额叶负波，这表明该成分不反映跨模态的注意力控制。在两项实验中均观察到一种称为LDAP的后部正波，但在实验2中，它在枕部头皮上更集中于后部。该成分似乎反映了多个过程，包括参与位置标记和目标准备的视觉过程以及参与注意力控制的跨模态过程。
