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Perception of strength from 3D faces is linked to facial cues of physique

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Abstract

Formidability is an important cue to male intra-sexual competitiveness. While previous studies suggest strength can be accurately perceived from faces, little is known regarding the specific morphological cues that are used to form judgments of strength. Here, we used a set of three-dimensional color- and texture-standardized Caucasian faces to elucidate whether judgments of strength are based on shape cues linked to body physique. We collected facial scans of 50 men and 68 women together with measures of upper-body strength, height, weight and body composition. Upper-body strength was positively correlated with body mass index (BMI) and height. Deriving scores of the face shape associated with BMI and height, we found the face-morphological BMI score explained 27% of the variance in perceived strength. As BMI conflates muscle and fat mass, we also related absolute muscle and fat mass, separately, to actual strength and found a positive association between strength and both muscle and fat mass. We attempted to derive scores capturing the face shape associated with muscle and fat mass, controlling for each other and height. We found that facial scores of male muscle and fat both positively related to perceived strength, explaining 37% of the variance in this judgment. Our findings suggest that perceptions of strength from faces are based on facial cues to body physique. For both sexes, perceptions of strength seem to reflect overall body size or bulk, while for men additional variance was explained by separating facial cues to muscle and fat mass. The differentiation of facial shape associated with relative muscle and fat mass may have implications for the understanding of a variety of interpersonal judgments related to strength, such as dominance and leadership.
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Details

Original languageEnglish
Pages (from-to)217-229
Number of pages13
JournalEvolution and Human Behavior
Volume37
Issue number3
Early online date10 Dec 2015
DOIs
StatePublished - May 2016

    Research areas

  • Physical strength, 3D face shape, BMI, Muscle, Body fat

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