September 2019
Volume 19, Issue 10
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2019
Evaluating Trustworthiness: Differences in Visual Representations as a Function of Face Ethnicity
Author Affiliations & Notes
  • Francis Gingras
    Université du Québec en Outaouais
  • Karolann Robinson
    Université du Québec en Outaouais
  • Daniel Fiset
    Université du Québec en Outaouais
  • Caroline Blais
    Université du Québec en Outaouais
Journal of Vision September 2019, Vol.19, 153b. doi:https://doi.org/10.1167/19.10.153b
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      Francis Gingras, Karolann Robinson, Daniel Fiset, Caroline Blais; Evaluating Trustworthiness: Differences in Visual Representations as a Function of Face Ethnicity. Journal of Vision 2019;19(10):153b. doi: https://doi.org/10.1167/19.10.153b.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Trustworthiness is rapidly and automatically assessed based on facial appearance, and it is one of the main dimensions of face evaluation (Oosterhof & Todorov, 2008). Few studies have investigated how we evaluate trustworthiness in faces of other ethnicities. The present study aimed at comparing how individuals imagine a trustworthy White or Black face. More specifically, the mental representations of a trustworthy White and Black face were revealed in 30 participants using Reverse Correlation (Mangini & Biederman, 2004). On each trial (500 per participant), two stimuli, created by adding sinusoidal white noise to an identical base face (White or Black, depending on the experimental condition), were presented side-by-side. The participant’s task was to decide which of the two looked most trustworthy. The noise patches corresponding to the chosen stimuli were summed to produce a classification image, representing the luminance variations associated with a percept of trustworthiness. A statistical threshold was found using the Stat4CI’s cluster test (Chauvin et al., 2005), a method that corrects for the multiple comparisons across all pixels while taking into account the spatial dependence inherent to coherent images (tcrit=3.0, k=246, p< 0.025). Results show that for a White face, perception of trustworthiness is associated with a lighter eye region; for a Black face, perception of trustworthiness is associated with a darker right eye and a lighter mouth. Statistically comparing both classification images (tcrit=3.0, k=246, p< 0.025) revealed that the eye region was more important in judging trustworthiness of White faces, while the mouth region was more important for Black faces. The present study shows that facial traits used to form the mental representation of trustworthiness differ with face ethnicity. More research will be needed to verify if this finding generalizes across populations of different ethnicities.

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