Arching the Back (Lumbar Curvature) as a Female Sexual Proceptivity Signal: an Eye-Tracking Study

@article{Pazhoohi2018ArchingTB,
  title={Arching the Back (Lumbar Curvature) as a Female Sexual Proceptivity Signal: an Eye-Tracking Study},
  author={Farid Pazhoohi and James F. Doyle and Ant{\'o}nio Filipe Macedo and Joana Arantes},
  journal={Evolutionary Psychological Science},
  year={2018},
  volume={4},
  pages={158-165}
}
It is common in studies of human mate preference to have participants judge the attractiveness of photographs in which models adopt a neutral facial expression or a neutral body posture. However, it is unlikely that humans adopt neutral expressions and postures in normal social circumstances. One way in which posture can vary is in the curvature of the lower spine. In some non-human animals, a “lordotic” posture (in which the lower spine is curved towards the belly) is associated in females… 
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