Leppänen Jukka M, Moulson Margaret C, Vogel-Farley Vanessa K, Nelson Charles A
Human Information Processing Laboratory, Department of Psychology, University of Tampere, Tampere, FIN-33014 Finland.
Child Dev. 2007 Jan-Feb;78(1):232-45. doi: 10.1111/j.1467-8624.2007.00994.x.
To examine the ontogeny of emotional face processing, event-related potentials (ERPs) were recorded from adults and 7-month-old infants while viewing pictures of fearful, happy, and neutral faces. Face-sensitive ERPs at occipital-temporal scalp regions differentiated between fearful and neutral/happy faces in both adults (N170 was larger for fear) and infants (P400 was larger for fear). Behavioral measures showed no overt attentional bias toward fearful faces in adults, but in infants, the duration of the first fixation was longer for fearful than happy faces. Together, these results suggest that the neural systems underlying the differential processing of fearful and happy/neutral faces are functional early in life, and that affective factors may play an important role in modulating infants' face processing.
为了研究情绪面孔加工的个体发生过程，在成年人和7个月大的婴儿观看恐惧、快乐和中性面孔的图片时，记录了他们的事件相关电位（ERP）。枕颞头皮区域对面孔敏感的ERP在成年人（恐惧面孔的N170更大）和婴儿（恐惧面孔的P400更大）中都能区分恐惧面孔和中性/快乐面孔。行为测量表明，成年人对恐惧面孔没有明显的注意力偏向，但在婴儿中，对恐惧面孔的首次注视持续时间比对快乐面孔更长。这些结果共同表明，恐惧面孔与快乐/中性面孔差异加工背后的神经系统在生命早期就已发挥作用，并且情感因素可能在调节婴儿的面孔加工中起重要作用。
