The dynamic allocation of attention to emotion: Simultaneous and independent evidence from the late positive potential and steady state visual evoked potentials
The dynamic allocation of attention to emotion: Simultaneous and independent evidence from the late positive potential and steady state visual evoked potentials
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DOI：
10.1016/j.biopsycho.2011.11.012
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发表时间：
2013-03-01
影响因子：
2.6
通讯作者：
Keil, Andreas
中科院分区：
文献类型：
--
作者：
Hajcak, Greg;MacNamara, Annmarie;Keil, Andreas
情绪刺激在没有明确指示的情况下捕获并保持注意力。事件相关电位的晚期正电位（LPP）成分可以用来跟踪对情绪刺激的动机性注意，并且与中性图片相比，它对情绪的影响更大。在频域中，稳态视觉诱发电位（ssVEP）也被用于跟踪对特定频率下闪烁的刺激的注意力。与LPP一样，与中性图片相比，情绪图片的ssVEP也更大。之前的工作表明，LPP和ssVEP都对“自上而下”的注意力操纵敏感，然而LPP和ssVEP之前尚未在同一参与者中使用相同的注意力操纵进行过检查。在本研究中，LPP和ssVEP振幅同时引起的不愉快和中性图片。在图片呈现的中途，参与者的注意力被引导到令人不快的图片的唤起或非唤起区域。与先前的工作一致，LPP减少时，注意力被导向非唤起相比，令人不快的图片引起的地区，观察到类似的结果ssVEP。因此，这两种皮层电测量指标的情感显着性和敏感的定向（这里：空间）注意。LPP和ssVEP的变化是不相关的，这表明这些措施是不是多余的，彼此可以捕捉不同的神经生理方面的情感刺激处理和注意。(c)2011 Elsevier B.V.保留所有权利。
Emotional stimuli capture and hold attention without explicit instruction. The late positive potential (LPP) component of the event related potential can be used to track motivated attention toward emotional stimuli, and is larger for emotional compared to neutral pictures. In the frequency domain, the steady state visual evoked potential (ssVEP) has also been used to track attention to stimuli flickering at a particular frequency. Like the LPP, the ssVEP is also larger for emotional compared to neutral pictures. Prior work suggests that both the LPP and ssVEP are sensitive to "top-down" manipulations of attention, however the LPP and ssVEP have not previously been examined using the same attentional manipulation in the same participants. In the present study, LPP and ssVEP amplitudes were simultaneously elicited by unpleasant and neutral pictures. Partway through picture presentation, participants' attention was directed toward an arousing or non-arousing region of unpleasant pictures. In line with prior work, the LPP was reduced when attention was directed toward non-arousing compared to arousing regions of unpleasant pictures; similar results were observed for the ssVEP. Thus, both electrocortical measures index affective salience and are sensitive to directed (here: spatial) attention. Variation in the LPP and ssVEP was unrelated, suggesting that these measures are not redundant with each other and may capture different neurophysiological aspects of affective stimulus processing and attention. (c) 2011 Elsevier B.V. All rights reserved.