Electrophysiological correlates of processing faces of younger and older individuals
Electrophysiological correlates of processing faces of younger and older individuals
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DOI：
10.1093/scan/nsq074
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发表时间：
2011-09-01
影响因子：
4.2
通讯作者：
Johnson, Marcia K.
中科院分区：
文献类型：
--
作者：
Ebner, Natalie C.;He, Yi;Johnson, Marcia K.
面孔加工中的“自身年龄偏向”表明面孔的年龄是影响面孔注意和记忆的重要因素之一。本实验探讨了年轻人和老年人面孔加工的电生理相关性。在性别分类任务的背景下，年轻的参与者看到了不熟悉的年轻和年长面孔的照片。事件相关电位的比较显示，早期成分对不同年龄的面孔敏感：（1）额中央电极上，年龄较大的面孔在160 ms（P200）处的正电位峰值大于年轻面孔，（2）额中央电极上，年龄较小的面孔在252 ms（N200）处的负电位峰值大于年龄较大的面孔;（iii）在枕颞电极处，年轻面孔在320 ms（N250）处的负向偏转峰值大于年长面孔;以及（iv）在顶骨和其他电极处，年长面孔在420 ms（LPP 420）处的晚期正电位峰值大于年轻面孔。我们讨论了本研究和以前发表的研究不同种族的面孔之间的相似性，这表明参与可比的电生理反应时，区分刺激类别。
The 'own-age bias' in face processing suggests that the age of a face constitutes one important factor that influences attention to and memory for faces. The present experiment investigated electrophysiological correlates of processing faces of younger and older individuals. Younger participants were presented with pictures of unfamiliar younger and older faces in the context of a gender categorization task. A comparison of event-related potentials showed that early components are sensitive to faces of different ages: (i) larger positive potential peaking at 160 ms (P200) for older than younger faces at fronto-central electrodes; (ii) larger negative potential peaking at 252 ms (N200) for younger than older faces at fronto-central electrodes; (iii) larger negative-going deflection peaking at 320 ms (N250) for younger than older faces at occipito-temporal electrodes; and (iv) larger late positive potential peaking at 420 ms (LPP 420) for older than younger faces at parietal and other electrodes. We discuss similarities between the present study and a previously published study of faces of different races as suggesting involvement of comparable electrophysiological responses when differentiating between stimulus categories.