Song Miao, Shinomori Keizo, Qian Qian, Yin Jun, Zeng Weiming
College of Information Engineering, Shanghai Maritime UniversityShanghai, China; School of Information, Kochi University of TechnologyKochi, Japan.
School of Information, Kochi University of Technology Kochi, Japan.
Front Psychol. 2015 Dec 22;6:1937. doi: 10.3389/fpsyg.2015.01937. eCollection 2015.
The present study examined the influence of expression configuration on cross-identity expression aftereffect. The expression configuration refers to the spatial arrangement of facial features in a face for conveying an emotion, e.g., an open-mouth smile vs. a closed-mouth smile. In the first of two experiments, the expression aftereffect is measured using a cross-identity/cross-expression configuration factorial design. The facial identities of test faces were the same or different from the adaptor, while orthogonally, the expression configurations of those facial identities were also the same or different. The results show that the change of expression configuration impaired the expression aftereffect when the facial identities of adaptor and tests were the same; however, the impairment effect disappears when facial identities were different, indicating the identity-independent expression representation is more robust to the change of the expression configuration in comparison with the identity-dependent expression representation. In the second experiment, we used schematic line faces as adaptors and real faces as tests to minimize the similarity between the adaptor and tests, which is expected to exclude the contribution from the identity-dependent expression representation to expression aftereffect. The second experiment yields a similar result as the identity-independent expression aftereffect observed in Experiment 1. The findings indicate the different neural sensitivities to expression configuration for identity-dependent and identity-independent expression systems.
本研究考察了表情配置对跨身份表情后效的影响。表情配置是指面部特征在传达情感时的空间排列，例如，张嘴笑与闭嘴笑。在两个实验中的第一个实验中，使用跨身份/跨表情配置析因设计来测量表情后效。测试面孔的面部身份与适应面孔相同或不同，同时，这些面部身份的表情配置也正交地相同或不同。结果表明，当适应面孔和测试面孔的面部身份相同时，表情配置的变化会削弱表情后效；然而，当面部身份不同时，这种削弱效应消失，这表明与依赖身份的表情表征相比，不依赖身份的表情表征对表情配置的变化更具鲁棒性。在第二个实验中，我们使用示意性线条面孔作为适应面孔，真实面孔作为测试面孔，以尽量减少适应面孔和测试面孔之间的相似性，这有望排除依赖身份的表情表征对表情后效的贡献。第二个实验得出了与实验1中观察到的不依赖身份的表情后效相似的结果。这些发现表明，依赖身份和不依赖身份的表情系统对表情配置具有不同的神经敏感性。
