Eimer M
Institut für Psychologie, Universität Müchen, Germany.
Biol Psychol. 1995 Oct;41(2):167-82. doi: 10.1016/0301-0511(95)05139-2.
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.
在逐次试验提示范式中，通过事件相关脑电位来测量选择性关注刺激位置和颜色的特定组合所产生的影响。在每次试验开始时呈现一个符号性预提示，指示即将出现的指令性刺激的与反应相关的位置和颜色。要求对出现在提示位置的不常见的相关颜色目标刺激做出反应。在被关注位置的刺激引发了增强的后部N1成分以及中线电极处增强的负波。在被关注位置的刺激未发现P1增强。被关注的颜色刺激引发了一个大约从220毫秒开始的广泛负波，对于在被关注位置呈现的刺激，该负波往往更大。这些结果表明，与持续注意力条件下测量的效应相当的事件相关电位（ERP）效应反映了对颜色等非空间特征的短暂注意力转移。短暂的空间注意力比短暂的颜色注意力产生更早、更大的ERP效应，并且可能调节非空间注意力的ERP效应。
