Lineup of faces sorted by masculinity / femininity
Male chickens were taught to rewarded by face #5 and not rewarded by face #3
Female chickens were taught to rewarded by face #5 and not rewarded by face #3
After their training was complete, they were subjected to the full line-up of faces. They obviously understood the facial heuristics of gender, as the chickens preferences continued beyond the trained faces.
The human preferences are "would you like to date this face?"
Does this imply that beauty is objective?
I don't really think it proves much beyond that chickens seem to understand human faces very well; which is something that hints that beauty is objective but it doesn't prove it.
More research needed.......
Source for study:
cogprints.org/5272/1/ghirlan…
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