Nothing like a little unconscious...or dare I say it, deliberate...bias to get the results you want. Granted, I'm not privy to the particulars of the study, but unless the infants observations (if you want to call them that)can be translated as "crying," or some similar distressful behavior, then the conclusion that these prolonged "looks" represent a recognition of danger is simply untenable.
Yup. The 'prolong look' was also used as an indicator when infants were used to identify beauty. The infants looked longer at female images that we considered beautiful, etc.
They decided from that data that we're born with the ability to recognize beauty. I was puzzled though when the babies of different races picked the same White girl as the most beautiful.