Tracking Historical Changes in Trustworthiness Using Machine Learning Analyses of Facial Cues in Paintings

L. Safra, C. Chevallier, J. Grèzes & N. Baumard

November 11, 2020

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Social trust is linked to positive societal outcomes, (eg economics, less crime & inclusivity) but is difficult to document. Machine learning algorithm analyses of portrait facial cues documents trustworthiness increased (1500–2000) paralleling the decline of violence & the rise of democratic values.
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