McMaster Integrative Neuroscience Discovery and Study, McMaster University, Hamilton, Ontario, Canada L8S 4K1.
Int J Psychophysiol. 2010 Mar;75(3):332-8. doi: 10.1016/j.ijpsycho.2009.12.015. Epub 2010 Jan 21.
Individual differences in attention biases for motivationally significant stimuli have been reported in clinical and normative populations. Few studies, however, have attempted to examine potential biological mechanisms underlying differences in the cognitive processing of emotional stimuli. The present study examined the extent to which two well-validated psychophysiological vulnerability markers of affective style [i.e., frontal electroencephalogram (EEG) asymmetry and cardiac vagal tone] predicted biased attention toward rapid presentations (approximately 250 ms) of angry and happy facial expressions. We found that right frontal EEG asymmetry and low cardiac vagal tone, taken together, predicted approximately 37% of the variability in attentional vigilance for angry faces. Frontal EEG asymmetry and cardiac vagal tone did not predict attention for happy faces, independently of each other. Our results provide preliminary evidence that two well established psychophysiological indicators of affective style bias early processing of motivationally salient stimuli.
个体在对动机相关刺激的注意力偏向方面存在差异，这在临床和正常人群中都有报道。然而，很少有研究试图探究情绪刺激认知加工差异的潜在生物学机制。本研究旨在考察两种经过充分验证的情感风格的心理生理易损性标志物[即额前脑电图（EEG）不对称和心脏迷走神经张力]在多大程度上可以预测对愤怒和快乐面部表情的快速呈现（约 250 毫秒）的注意力偏向。我们发现，右额前 EEG 不对称和低心脏迷走神经张力共同预测了对愤怒面孔注意力警觉性的约 37%的可变性。额前 EEG 不对称和心脏迷走神经张力彼此独立，均不能预测对快乐的面孔的注意力。我们的结果初步表明，两种成熟的情感风格的心理生理指标可以偏向对动机相关的显著刺激的早期加工。
