Ishizu Tomohiro, Ayabe Tomoaki, Kojima Shozo
Department of Psychology, Graduate School of Human Relations, Keio University, Tokyo, Japan.
Int J Neurosci. 2008 Jul;118(7):955-66. doi: 10.1080/00207450701769398.
During the viewing of human faces, it is easier to recognize detailed features if the face is presented in an unusual configuration; for example, a split face. The present study used electroencephalography to investigate the brain activity elicited in response to a neutral, inverted, and split face and compared this to the activity produced in response to a non-facial stimulus (a clock). Results showed that the N170 response amplitude was larger and its latency longer during recognition of split and inverted faces as compared to a normal face, whereas no amplitude change was seen for the different clock configurations. However, for the P300 component, larger amplitudes were observed in both the face and the object condition. Taken together, the results suggest that unusual human face presentations are detected at earlier stages than unusual object presentations.
在观察人脸时，如果人脸以不寻常的构型呈现，例如分裂脸，就更容易识别其细节特征。本研究使用脑电图来探究对中性、倒置和分裂脸做出反应时引发的大脑活动，并将其与对非面部刺激（时钟）产生的活动进行比较。结果表明，与正常脸相比，在识别分裂脸和倒置脸时，N170反应幅度更大且潜伏期更长，而不同时钟构型下未观察到幅度变化。然而，对于P300成分，在面部和物体条件下均观察到更大的幅度。综合来看，结果表明不寻常的人脸呈现比不寻常的物体呈现能在更早阶段被检测到。
