Pönkänen Laura M, Hietanen Jari K, Peltola Mikko J, Kauppinen Pasi K, Haapalainen Antti, Leppänen Jukka M
Human Information Processing Laboratory, Department of Psychology, University of Tampere, Tampere, Finland.
Neuroreport. 2008 Mar 5;19(4):497-501. doi: 10.1097/WNR.0b013e3282f7c4d3.
Although faces are typically perceived in the context of human interaction, face processing is commonly studied by displaying faces on a computer screen. This study on event-related potential examined whether the processing of faces differs depending on whether participants are viewing faces live or on a computer screen. In both the conditions, the participants were shown a real face, a dummy face, and a control object. N170 and early posterior negativity discriminated between faces and control object in both the conditions. Interestingly, early posterior negativity differentiated between the real face and the dummy face only in the live condition. The results indicate that a live face, as a potentially interacting stimulus, is processed differently than an inanimate face already at the early processing stages.
尽管面孔通常是在人际互动的背景下被感知的，但对面孔处理的研究通常是通过在电脑屏幕上显示面孔来进行的。这项关于事件相关电位的研究考察了参与者观看真实面孔还是电脑屏幕上的面孔时，面孔处理是否存在差异。在两种条件下，都向参与者展示一张真实面孔、一张虚拟面孔和一个对照物体。在两种条件下，N170和早期后负波都能区分面孔和对照物体。有趣的是，早期后负波仅在真实观看条件下能区分真实面孔和虚拟面孔。结果表明，作为一种潜在互动刺激的真实面孔，在早期处理阶段就与无生命面孔的处理方式不同。
