Scientists at the University of Manchester, King's College London and the University of Liverpool have found that an infant's preference for a person's face, rather than an object, is associated with lower levels of callous and unemotional behaviors in toddlerhood.
The study, which was published in Biological Psychiatry, assessed if 213 five-week-old infants spent longer tracking a person's face compared to an inanimate object – in this case a red ball.