Department of Psychology, University of Southern California, Los Angeles, CA 90089-1061, USA.
Soc Cogn Affect Neurosci. 2007 Mar;2(1):39-44. doi: 10.1093/scan/nsl043.
Previous work has shown differential amygdala response to African-American faces by Caucasian individuals. Furthermore, behavioral studies have demonstrated the existence of skin tone bias, the tendency to prefer light skin to dark skin. In the present study, we used functional magnetic resonance imaging (fMRI) to investigate whether skin tone bias moderates differential race-related amygdala activity. Eleven White participants viewed photographs of unfamiliar Black and White faces with varied skin tone (light, dark). Replicating past research, greater amygdala activity was observed for Black faces than White faces. Furthermore, dark-skinned targets elicited more amygdala activity than light-skinned targets. However, these results were qualified by a significant interaction between race and skin tone, such that amygdala activity was observed at equivalent levels for light- and dark-skinned Black targets, but dark-skinned White targets elicited greater amygdala activity than light-skinned White targets.
先前的研究表明，白种人对非裔美国人的面孔会有不同的杏仁核反应。此外，行为研究已经证明了肤色偏见的存在，即人们倾向于喜欢浅色皮肤而不是深色皮肤。在本研究中，我们使用功能磁共振成像（fMRI）来研究肤色偏见是否会调节与种族相关的杏仁核活动的差异。11 名白人参与者观看了不同肤色（浅色、深色）的陌生黑人及白人面孔的照片。与以往的研究结果相似，黑人面孔比白人面孔引起了更大的杏仁核活动。此外，深色皮肤的目标比浅色皮肤的目标引起了更多的杏仁核活动。然而，这些结果受到种族和肤色之间的显著交互作用的限制，即对于浅色和深色的黑人目标，杏仁核活动水平相同，但深色的白人目标比浅色的白人目标引起了更大的杏仁核活动。
