EVENT-RELATED POTENTIAL CORRELATES OF TRANSIENT ATTENTION SHIFTS TO COLOR AND LOCATION
EVENT-RELATED POTENTIAL CORRELATES OF TRANSIENT ATTENTION SHIFTS TO COLOR AND LOCATION
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DOI：
10.1016/0301-0511(95)05139-2
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发表时间：
1995-10-01
影响因子：
2.6
通讯作者：
EIMER, M
中科院分区：
文献类型：
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作者：
EIMER, M
有选择地注意刺激位置和颜色的特定组合的效果是通过逐个试验的线索范式中的事件相关脑电位来衡量的。在每一次试验开始时，都会提出一个象征性的要点，表明即将到来的迫切刺激的反应相关的立场和颜色。要求对出现在提示位置的相关颜色的不频繁的目标刺激做出反应。注意部位的刺激可引起N1后部成分增强以及中线电极负性增强。在观察部位未发现刺激的P1增强。注意到的颜色刺激从大约220毫秒开始引起广泛的负波，而在注意到的位置出现的刺激往往更大。这些结果表明，短暂的注意转移到非空间特征，如颜色，反映在事件相关电位(ERP)效应上，与持续注意条件下测量的效应相当。短暂性空间注意比短暂性注意产生更早、更大的事件相关电位效应，并且可能调节非空间注意的事件相关电位效应。
Effects of selectively attending to specific combinations of stimulus location and color were measured by means of event-related brain potentials in a trial-by-trial cueing paradigm. A symbolic precue was presented at the beginning of each trial indicating the response-relevant position and color of an upcoming imperative stimulus. Responses were required to infrequent target stimuli of the relevant color appearing at the cued location. Stimuli at attended locations elicited enhanced posterior N1 components as well as enhanced negativities at midline electrodes. No P1 enhancement was found for stimuli at the attended location. Attended color stimuli elicited a broad negativity starting about 220 ms that tended to be larger for stimuli presented at attended locations. These results show that transient attention shifts to non-spatial features like color are reflected by event-related potential (ERP) effects comparable to the effects measured under sustained attention conditions. Transient spatial attention yields earlier and larger ERP effects than transient attention to color and may modulate the ERP effects of non-spatial attention.