![]() The female participants looked longer at the waist area, while the men focused their attention on the models' hips. ![]() Results of the eyetracking part of the study further showed that participants, irrespective of their gender, looked at the rear view of the models much longer than the side or front angles. "Increased curvature increases the perception of attractiveness," explains Pazhoohi. The more arched the back of the 3D model, the more appealing the men and women participating in the study rated it to be. The results show that small changes in the angle of a woman's back influence how attractive others perceive her to be. Eye-tracking technology was used to monitor the participants' gaze while they were looking at the images. Three different views (from the front, side and the back) of each of the models were then presented to 82 undergraduate men and women, who had to rate how attractive they found each posture. This resulted in variations in how their backs arched and their buttocks extended outwards. The models' backs were manipulated at slightly different yet normal body angles. To do so, six computer-generated 3D models of a woman's upper body was generated. The researchers set out to study the role that body posture plays in the development of human mate attraction and selection. According to Pazhoohi, this posture may have also evolved as part of the courting behaviour of humans, and as a signal of a woman willing to be courted by a man. Studies of animals such as rats, guinea pigs, sheep, cats, ferrets and primates have shown that this so-called lordotic posture, in which the lower spine is curved towards the belly, can signal the readiness of females to mate. The findings are published in Springer's journal Evolutionary Psychological Science. A team led by Farid Pazhoohi of the University of Minho in Portugal used 3D models and eye-tracking technology to show how the subsequent slight thrusting out of a woman's hips can hold a man's gaze. Researchers have provided scientific evidence for what lap dancers and those who twerk probably have known all along - men are captivated by the arched back of a woman.
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