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Examples of images with 0.7 and 0.9 waist-to-hip ratios (WHRs; top part). The left image in each pair depicts the 0.7 WHR whereas the right image depicts the 0.9 WHR. Preference was tested by presenting a stimulus of each kind side-by-side. Three-and-a-half-month-olds preferred the images with the smaller waist-to-hip ratios but newborns showed no preference (bottom part).
