[O1] 口頭1 《知覚・感性1》

[O1-04] The role of spatial frequency information in discriminating between deceptive and genuine faces in face classification task

*Ken Kihara¹, Yuji Takeda¹ (1. Department of Information Technology and Human Factors, National Institute of Advanced Industrial Science and Technology (AIST))

Keywords:deceptive face, spatial frequency information, face classification task

We can discriminate between deceptive and genuine faces. We investigated how we use spatial frequency components for the discrimination. In a previous study, participants were asked to generate instructed faces by tuning the intensity of a smiling and angry expression. In the present study, participants were asked to classify presented faces composed of the low and high spatial frequency (LSF and HSF) expressions as either deceptive smile, deceptive anger, genuine smile, or genuine anger. The intensity of the expression were changed from +1 (the most smiling) to -1 (the most anger). LSF and HSF components of the images were varied independently. The results showed that a deceptive smile consisted of different intensities between LSF and HSF, as shown in the previous study. Therefore, we can conclude that we discriminate between deceptive and genuine smiles by using the unbalanced intensities of expression in LSF and HSF.