Alho K, Escera C, Díaz R, Yago E, Serra J M
Department of Psychiatry and Clinical Psychobiology, University of Barcelona, Catalonia, Spain.
Neuroreport. 1997 Oct 20;8(15):3233-7. doi: 10.1097/00001756-199710200-00010.
Involuntary attention to auditory stimulus changes during a visual discrimination task was studied with event-related potentials (ERPs) recorded from the human scalp. A repetitive standard tone or an infrequent, slightly higher deviant tone preceded each visual target stimulus. Deviant tones elicited the mismatch negativity and P3a ERP components and caused increases in reaction time and error rate in the visual task indicating involuntary attention to an auditory stimulus change. These effects were observed even when the tones occurred simultaneously with a visual warning stimulus introduced to keep attention focused on the visual task. In the latter condition, involuntary switching of attention away from the visual task also attenuated the N1 ERP component to visual target stimuli preceded by the deviant tone.
通过记录人类头皮的事件相关电位（ERP），研究了在视觉辨别任务中对听觉刺激变化的非自愿注意。在每个视觉目标刺激之前，会出现重复的标准音调或偶尔出现的、略高的偏差音调。偏差音调引发了失配负波和P3a ERP成分，并导致视觉任务中的反应时间增加和错误率上升，表明对听觉刺激变化的非自愿注意。即使这些音调与引入的视觉警告刺激同时出现，以保持注意力集中在视觉任务上，这些效应仍然会被观察到。在后者的情况下，注意力从视觉任务上的非自愿转移也会减弱偏差音调之前的视觉目标刺激的N1 ERP成分。
