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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/33144

Title: What's in a smile? Cultural differences in the effects of simiing on judgments of trustworthiness
Authors: Ozono, Hiroki
Watabe, Motoki
Yoshikawa, Sakiko
Nakashima, Satoshi
Rule, Nicholas O.
Ambady, Nalini
Adams, Reginald B. Jr.
Keywords: trustworthiness
smile
cultural differences
symmetry
Issue Date: 2010
Publisher: uman Behavior and Evolutionary Society o f Japan
Citation: Ozono, H., Watabe, M., Yoshikawa, S., Nakashima, S., Rule, N. O., Ambady, N., & Adams, R. B., Jr. (2010). What's in a smile? Cultural differences in the effects of simiing on judgments of trustworthiness. Letters on Evolutionary Behavioral Science, 1, 15-18.
Abstract: How do people detect trustworthiness in others? Some researchers have shown that research participants trust smiling faces more than non-smiling faces. We examined cultural differences in this “smile effect.” We investigated whether three elements of a smile (smile intensity at the eyes, smile intensity at the mouth, and facial symmetry) would differently influence American and Japanese participants’ judgments of trustworthiness. In our experiment, images of 54 American and 69 Japanese male faces were initially rated for intensity of expression in the eyes and mouth, and for symmetry of the smile, by Japanese participants. The images were then presented to 142 American and 80 Japanese participants, who were asked to rate each face’s trustworthiness. The results showed that Japanese participants rated as more trustworthy faces with greater upper-half intensity and greater smile symmetry, but rated as less trustworthy faces with greater lower-half intensity. In contrast, American participants rated as more trustworthy faces with greater lower-half intensity, but there was no influence of upper-half smile intensity, nor of smile symmetry.
URI: http://hdl.handle.net/1807/33144
Appears in Collections:UofT Faculty publications

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