Women can tell if men like babies by seeing pix of their faces

Men's faces give off subtle visual cues about their testosterone levels and the degree to which they like children, and women can detect these signs from photos, though they don't know what cues communicate these factors to them:

James Roney at the University of California, Santa Barbara, US, and his colleagues asked 39 undergraduate men to look at pairs of pictures each consisting of a photo of an adult and a photo of an infant. The men were asked which photo they preferred. Researchers also took saliva samples from the male volunteers to determine their testosterone levels.

Each man was then asked to maintain a neutral expression while researchers photographed his face. Then, 29 female undergraduates rated the photographed male faces according to how much they believed the men liked children.

Researchers found that women could often correctly guess which men preferred the infant photos.

Link

Update: Avi sez, "The Roney research paper is available for download here."