Citation

Short LA, Mondloch CJ, McCormick CM, Carré JM, Ma R, Fu G, Lee K. Evol. Hum. Behav. 2012; 33(2): 121-129.

Affiliation

Brock University, St. Catharines, ON, Canada.

Copyright

(Copyright © 2012, Elsevier Publishing)

DOI

10.1016/j.evolhumbehav.2011.07.002

PMID

22611331

Abstract

The human face provides a wealth of information pertaining to the internal state and life-stage history of an individual. Facial width-to-height ratio is a size-independent sexually dimorphic trait, and estimates of aggression made by untrained adults judging own-race faces were positively associated with both facial width-to-height ratio and actual aggressive behavior. Given the significant adaptive value of accurately detecting aggressiveness based on facial appearance, we hypothesized that aggression estimates made by adults and 8-year-olds would be highly correlated with male facial width-to-height ratio even for a face category with which they had minimal experience-other-race faces. For each of the four race and age groups, estimates of aggression were positively correlated with facial width-to-height ratio irrespective of rating own-or other-race faces. Overall, the correlations between facial width-to-height ratio and ratings of aggression were stronger for adults than for children. Sensitivity to facial width-to-height ratio appears to be part of an evolved mechanism designed to detect threats in the external environment. This mechanism is likely broadly tuned and functions independently of experience.

Language: en